school, work li
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school, work li
slkfjsdlf
unobserved
hmm typo?
The belief in Newton's secondlaw of motion (F = Ma), by way of contrast, is not inductively based. We do not have the requisite evidencefrom which to generalize because neither the force acting on a body nor its mass is observable. Our belief iswarranted (if at all) by the fact that it best explains such phenomena as planetary motion, the tides, fallingbodies, and motion on inclined planes.
Subtle differnce, that is not fully explored.
why may not I say taht we believe in the law of motion becasue we see that the planets obey a constant pattern of motion so we generalize from that to our next case that tommorow they will obey taht same law and hence hte law of motion hodls?
and principles, on which the influence of these objects entirely depends.Our senses inform us of the colour, weight, and consistence of bread; butneither sense nor reason can ever inform us of those qualities, which fit itfor the nourishment and support of a human body.
carbohydrates?
. We fancy, that were we brought, on asudden, into this world, we could at first have inferred, that one Bil-liard-ball would communicate motion to another upon impulse; and thatwe needed not to have waited for the event, in order to pronounce withcertainty concerning it.
This is convincing. It seems unclear that its a air tight case for "if you were just teleported to this universe you could not make any prediction at all about cause and effect of new objects" but this does seem intuively not terrible.
are also readily confessed to be known only by experi-ence; nor does any man imagine that the explosion of gunpowder, or theattraction of a loadstone, could ever be discovered by arguments a priori.
Is this really true? Surely some facts about this world are predictable, Hmm but science says test everythign against the world and rely on that experiential evidence.
Maybe its fine you cant deduce things a priori? I imagine tho that if a perfect reasoner had access to all the worlds information they would deduce and a lot more things beyond just connections between two ideas. Sort of like if you give von neumman the axioms of probability he can come up with like the total law of probability independantly.
No objectever discovers, by the qualities which appear to the senses, either thecauses which produced it, or the effects which will arise from it; nor canour reason, unassisted by experience, ever draw any inference concern-ing real existence and matter of fact
This claim is quite strong. Is it really the case that no new object, only by which the qualities which I can sense can i make inferences on cause and effect on? I mean what about natural instincts of animals, well one could argue this is experience passed down by genetics and not apriori reasoning. What about if I know orange fires are dangerous ik blue fires are too? Well I guess I have experience of fires are dangerous and I am just using htat experience. What about if I just sense the heat of the fire and guess that if i go into it I will burn? I guess this is the idea that if something is hot from a distance its even hoter with less distance which you cant get from logic? Or can you? can you not reason a priori this is how the world owrks? I dot htink so you could imagine a world in which thats not how energy works. Hmm
Hypothesis is cool af
@khandelwal__arjun would love to chat with fellow hypothesis users!
time = .....................................................
2.4s
Plan an investigation to determine the effect of temperature on vitamin C concentration in fruit
Independant variable - have 5 samples of fruit juice at different temperatures 10 degrees, 20 degrees, 30 degrees 40 degrees and 40 degrees
Dependant variable - Number of drops of DCPIP taken for the juice to remain purple
Control - The volume of fruit juice - The initial concentration ro type of fruit juice
Method Using a thermostatically controlled water bath heat or maintain 5 different samples of fruit juice at different termperatres.
After 15 minutes measure the temperature in the fruit juice and then add drops of DCPIP. It should change to colorless initially but after a while it will stay purplle. Note the number of drops required for it to stay purple
Replicate the experiment in order to calculate an average and minimze error
State the result of a positive test.
Color changes from blue to purple
State the name of the reagent or solution that would be used to test the fruit juice for
Bennedits solution
State the name of the reagent or solution that would be used to test the fruit juice for
Iodine solution
variable
Percentage of light that is absorbed
variable
size of potato
several
Because you can take an average of all the results and also notice anomolies
this
Use a theromostatically controlled water bath to maintain the temperatures
safety hazard in the investigation.
Using a knife may be dangerous
possible source of error in step 8.
Difficult to cut potato to exactly 2 cm
State a conclusion for these results.
The higher the temperature, the faster the rate of diffusion. They are positively correlated
.
38
water in step 2 ............................................... °C
61
Comment Monique a-t-elle profité physiquement de son initiative ?
il a retrouve la farome en faisainttant d'activite physiceq chaque semaine
Quels objectifs Monique a-t-elle réussi à accomplir ? (Donnez
preserver la beaute de la quote encourager d'autres presoones a souvre son eemple
Que font les gens quand ils voient Monique sur la plage ?
ils sonts felicitent de tous ses efforts
Pourquoi Monique trie-t-elle les déchets qu’elle ramasse ?
a trouver tout ce qui peut etre recycle
Après sa première expérience sur la plage, qu’est-ce que Monique a décidé d’essayer de
a nettoyer la plage elle- meme elle voulait changer le comportement des vacanciers
Qu’est-ce qui a mis Monique en colère sur la plage ?
une poubelle
déménagé
pour etre plus pres de ses petits-enfants
Quel était le métier de Monique ?
avocate
d
8
c
7
a
5
e
3
b
2
Qu’est-ce qui aidera Luc à se rappeler son séjour ?
les photos
Combien de temps Luc a-t-il passé en Angleterre ?
une semaine
Qu’est-ce que le guide a fait pendant le tour de Londres ? (Donnez
il a donne un commentair sur les sites il a explique l'histoire de la capitale
De quoi Luc a-t-il parlé quand il a revu ses copains ?
sa premiere nuit en angleterre
Qu’est-ce que Luc a trouvé facile à faire dans la famille anglaise ?
a comprendre ce qu'on disait
Comment était la famille d’accueil de Luc ?
vraiment gentille
s’inquiétait
il etais seul
Quelle était la destination des élèves français en Angleterre ?
une ville pres de londres
Qui a été malade pendant la traversée ?
trois garcons
À quelle heure le car est-il parti ?
dix heures du soir
Quand Luc a-t-il fait le voyage en Angleterre ?
A Paques
et
H
Il faut payer avant de sortir.
D
papier
F
l’eau
B
veux
E
Arnaud ferme la porte.
B
Je donne à manger au chien.
D
Il va réparer son vélo aujourd’hui.
C
Je vais prendre une douche.
A
frigo
F
He knows they both acted out of the samemistaken impulse, looking for comfort in a world they fearedwas dying out
They were both motivated to date eachother by an impulse to hold on to their indian culture which was shown to be fragile by their epxeriences
signature croquettes for anupcoming party
her cooking has nowbecome "signature"instead of the scrappy aproximation it was once was
new identity through love
Love is almost a tool to pursue and express identity This can be seen when Gogol uses his love with maxime to pursue an americain identity, or when he goes backto moushimi to maintain a bengali identity
o keep her own last nam
Independance and rebellion
s photos are taken, Gogol isaware that they are fulfilling a collective fantasy for theseBengali immigrants by marrying one another. He is also awarethat most of the preparations are left over from Moushumi’slast wedding
Feels as though there is an invisible but collective pressurefrom their parents and teh rest of the bengali ammerican commitiy for them to marry. They feel as though they are complying with obedieance which is something that will later leave a bitter tastein moushumis mouth causing her to have second thoughts. Additionally the left over from moushims last wedding highlight how recently her fiasco with graham had occured and how her relationship with gogol seems a little bit too rushed.
identity
By keeping his second identiy that of Gogol or his famililal indian side away from maxime by hiding it from her. He created a relationship in which maxime did not fuly trully understand gogol only his americanised identity of nikhil. Therfore when he is wrenched back into his identity as gogol there is a fundamental disconnect in the relationship as maxime cant understand the choices gogol wouldmake nor thefeelins he feels
understand that she is referring to theMetropolitan Museum of A
Until now his identities of gogol and nikhil had been kept strictly seperate and disparate but now for the first time these two sphers of his life have intersected. This would cause the general anxiousness that Gogol feels throughout the encounter.
this angst he feels regarding being together makes him want to get this expierence over with. As a result he barely says goodbye to his father which will tradgeically be the last time he can talk to him. Gogols idenity confusion therefore leads to his last words with his father being rushed- not as how gogol would have liked
refuses to throw them away.
independance and rbebellion
as well, to keep up with his Englishlessons at nursery.
a carefull balancing act played by ashima to make sure gogol is not out of place in america but also not out of touch with india
Gogolscreaming with the change in air pressure
physical pain but this journey will aslo bring him some mental angst in the future
her father is dead.
Two important father figures die disttanced from Ashima, her own father, and the father of her children or Ashoke. This elicits a lot of sympathy for her and also perhaps suggests why she has such an inclination or drive to stay connected and with family.
plays the part of
idea of everything in america seeming fake or like a pretense, not grounded in culture family and peopel
children at home unsupervised
Indian parents are often overprotective
home, not a hospital
Idea that a baby should be welcomed in a home around family in a place that has meaning. Not a coldalmost commercialised hospital
she is not alone after all
Family is the only thing immigrants have in foreign countries so this emphaseis the importance of stikcin together
too shor
american traditions/normalities are lacking
Crystallized intelligence
As he is much older now, Ludy has much more crystallized intelligence compared to wheen he first shelved books in the library. This means he has accumulated a greater knowledge of facts and details about the world. This can help him suggest simple books to disadvantaged children because he remembers a lot of good books like Dr Seuss for example that are easy to comprehend.
Self-actualization
Self actualisation according to Maslows hiearachy of needs is the final need that humans need to fulffill. Ludy's return to the library and work as a volunteer may allow him to attain self-actualisation as now he feels he has fulfilled his potential in life by creating programs and helping people. Comapred to his old desk job which was unfullfiling he was not self-actualised over there but now he will be.
Episodic memory
Episodic memory refers to the memory of events. Ludy returns to working at the ibary because his episodic memory allowed him to recall how much he enjoyed working at the libary when he was a senior in highschool
Self-efficacy
Self-efficacy is the bellief in ones own ability and the confidence one has in their competenace. Ludy may have a high self-effiacay if he belives that his volunteering program will be succesful and this may actually result in his volunteering program being succcessl in reality.
Broca’s area
The Broca's area helps Ludy to speak. He uses the Broca's area while talking to the disadvantaged children.
Big Five trait of extraversion
If Ludy has low levels of extraversion he would be an introvert. This may mean he gets exhausted after being in the company of others and needs time to recharge by being alone. This would hinder his work as a volunteer because he would get exhausted after talking to all his fellow volunteers and the children.
Altruism
Altruism is when someone does something to help others even if it could bring harm to themselves or not help themselves. Ludys work as a volunteer is an example of altruism as he does not earn any money himself but he brings benefit to the disadvantaged children. In fact, financially he probably brinsg harm to himsefl because of the oppurtunity cost of not working a desk job, however his altruistic drive is enough for him to still volunteer.
Lawrence Kohlberg’s preconventional stage
In this moral stage of development people make moral decisions purely based on how the outcome will effect them. If a child felt like they could take additoinal candy and not get in any trouble, and if they were in the preconvential stage of moral development, then they would take the additonal candy.
Deindividuation
When people are in a groups they tend to act different to how they would act alone, often becoming more rowdy and misbehaved. In this case children in a group may have had a sense of deindividulatioation and if that was the case this would have made them take candy if there were in a group even if they would nto normally take a candy when alone.
Modeling
Modelling is a type of learning especially common in kids when they learn behaviour by observing other people to do it. Perhaps one of the kids had celebrated this annual activity last year with their elder brother who they really respected. If they saw this elder brother take additonal candy they are more likely to also take additional candy during this experiment.
Explain why the study is not a naturalistic observation.
Because she manipulates the independatn variable of if the kids kept masks on or not, by asking half the children to remove their masks. This makes this an experiment
Explain why the psychologist cannot generalize her findings to all children.
Because she did not take a random sample of all the children in the whole world so the sample which she collected data from was not represenative of all children. It is possible that the only people who came to her door steps were kids who lived in the same neighbourhood as her, so then she can only generalize her findings to children who live in her neighbourhood.
Explain how the data support or do not support each of the psychologist’s hypotheses.
But the datay also does not support her other hypothesis. The psycogolists predicted that the kids would take more candy when they were alone however according to the data this was not the case.
Identify the operational definition of the dependent variable in this study.
The Operational definition would be the proportion of kids that took additional candy measured as a percentage.
Explain how levels of processing are related to this research.
Group A had deep processing as they encoded the word pair in a meaningful way. This allowed them to recall more words compared to Group B which probably used more shallow processing.
Explain how the primacy effect could apply to this research.
The students would be more likely to remember the word pairs near the start of the list.
Explain the ethical flaw that is explicitly presented in the scenario.
Dr. Jones forced the subjects to complete this task as part of their homework instead of finding willing volunteers.
Explain what the different standard deviations indicate about the data from the two groups.
It is a measure of how much the average value deviates or is different from the mean. It is a measure of variance. Group A has a standard deviation of 4 words, so on average each value is 4 words away from 25 words. Group A has a lower variance or standard deviation then Groub B which has one of 6 words.
Explain why the type of research design being used is appropriate for this study.
Because it uses random assigmnet into an experimental and control group. To get mitigate the effect of counfounding variables, allowing Dr Jones to infer a cause and effect relationship between mental imagery and memory
Identify the control group.
Group B
Identify the independent variable presented in the study.
The independent variable was if the group was told to form a mental image or not.
Explain how a psychoanalyst would use free association with Damian.
A Psychoanalyst would allow Damian to talk uniterrpetd ( at first) and make connections with objects. Once Damian has talked a lot the Psychoanlayst may even look for areas of resistance where Damian seems hesitant to talk about. He can form use this to try to understand the unconcious urges that are giving damian a disorder
Explain how Damian’s parents could use a behavioral approach to get him to apply to college using a
A fixed-ratio schedule is when reinforcement is provided after a set number of repetitions of the behaviour. His parents can use this in the following way: Every time Damian Finishes 2 colledge essays He gets to play 1 hour of his favourite videogame. Here the positive reinforcement of gaming time makes Damian more likely to repeat the behaviour of completing colledge essays which will help him in applying to colledge
Mental set
Mental set is when you approach a problem with a fixed idea especially if that way has worked in the past. When moving on to the next Level if Damian may use the same method he used in the past however this may not be ideal if the new leevel requires another way of thinking or another solution
Monocular depth cue of interposition
The Monocular depth cue of interposition is a depth cue that only needs one eye and it is when you judge distance based on if an object is blocking another one. While playing a video game Damian can look at his computer screen, and he can use the monocular depth cue of interposition to determine weather objects in this virtual world are far away or not. This can help him while playing videogames
Reciprocity
Reciprocrity Norm states that we are more likely to do nice thing to others if they do nice things for us( but the same applies for bad things). Here if Damian's Friends offer him tips regarding more successful strategies for gaming then Damian will be inclinded to give them some of his own tips.
Algorithm
While playing a complex game that requires skill to solve. Damian may employ the use of algorithms which are logical step by step procedures which are slow but always get the correct answer. To solve a problem at a given level in the game Damian may use an algorithm to help him
Motor cortex
The Motor cortex is the part of the brain that deals with fine motor skills. Damian's Motor cortex helps him make precise movements with his fingers in order to play video games. He moves his fingers precisely in order to hit his controller buttons to play a videogame
Sensory adaptation
He will get used to the number of faces eventually
Social facilitation
He does well when more people are watching because he has practised his lines
Selective attention
There may be a lot of sounds happening in the theatre such as audience members coughing or music in the background. But if James pays selective attention to his co actors dioalogues he can percieve them and use them as cues to rememebr his lines.
Positive reinforcement
If james delivers a rivetting monologue the audience will clap enthusiatically for him. This will make it more likely for him to deliver the next monologe in the play with the same enthu
Arousal theory
Arousal theory suggests that people are motivated to seek an optimal level of arousal thats not too high or too low. Here James level of arousal is to high and hes very nervous, so he decides to use his psychological knowledge to help himself calm down
State-dependent memory
If James practised his lines on the same stage as stage as he is performing today then he is more likely to remmeber his lines
Absolute threshold
If some of the classmates are presenting their infromation very quietly. Then the sound may be below the absolute thrshold level for students sitting in the back and therefore they will not be able to hear the information and therefore wont be able to retainit
Proactive interference
Proactive interefence is when memory or learning from the past interefest with the retrieval of new learninigs/memoriies. If the class has learnt a similar concept before then it may impede their ability to retain the new information. For example whilelearning operant conditioning some people suffering from proactive inteference may say that in operant conditioning there is a conditioned response which would be an example of proactive interefence if they learned classicalconditioning first.
Extrinsic
Extrinsic motivation is when we are motivaded by external rewards. A group may be externally motivated to do their project well and teach well because if they do so and the class performs wellon that section then they will be rewarded by a good grade.
Self-fulfilling prophecy
A self-fulling prochecy described the phenonmeon when humans believe something will happen it is more likely to happen. If one of the groups believe that there is no way that students can do the job of a teachers this may actually hinder the development of students projects.
Mental set
A mental set is how we
loafing
Social loafing is when group members do less work compared to their peers because they believe the other group members will make up for them. In this case, members in the group may do less work then their peers while teaching the concept for example they may not make their assigned slides on Power point, but in the end they will all still ge tthe same grade.
Explain how antibodies protect the body against pathogens.
Antibodies have a complementary shape to the antigens on the pathogens. They can bind specifically to the antigen (only to the antigen). After binding they can either mark the pathogen so that phagoctyes can destroy it by phagocytosis. Or they destroy the pathogen directly by destroying its cell wall.
Explain how the two injections of the vaccine result in better protection against diphtheria
The two injections of the vaccine actually inject a harmless dead or attenuate version of the bacteria that causes diphteria. The antigens present on this bacteria induce an immune response and the creation of memory cells. These memory cells result in the long term protection against diphteria. vaccination is a form of acttive immunity while injectingg antitoxin antibodies is a form of passive immunity
Explain the advantage of giving the person an injection of antitoxin antibodies.
These antibodies will neutralise the toxins released by the bacteria. This would relieve some of the symptoms of the patient and prevent further damage from occuring from the toxin. This would work very fast and immediately
Describe how an embryo is formed from a zygote.
THrough a process known as Mitosis. The number of chromosomes in the nucleus of a zygotic cell double and then the nucleus split into two in the process formming 2 genetically identical cells. Which are identical to the zygotical cell and eachother. Each of these 2 cells divide by mitosis again and this continues until a clump of cells have formed known as the embryoy
Describe the function of the jelly coat.
To become hard once the egg is fertlised to stop other sperms from enterin the egg
protein
To provide energy to for the zygote to divide and form an embryoy
Explain the advantages of this response to the survival of seedlings and mature plants.
It makes sures that seedlings grow away from the ground and into the air or the sunlight. Because for example if the seedlins grew randomly then they could have grown into a random direction into the soild but because of negative gravitropism they grow upwards. In mature plants let us say they have a canapoy above them blockin sunlight, then negative gravitropism is useful because it helps them to grow up and past that canpopy to recieve sunlgiht
Explain how the plant hormone causes the response of plant
Auxin is secreted by the tips of the shoot. It diffuses to the side closer to the ground. It accumuatales here and promotes cell elongation. This makes the plant bend upwards (in the opposite direction to wehre the auxin was).
State the name of the plant hormone that causes the response of the shoot of plant
Auxin
rotating
To act as a control in this experiment. To negate the effects of gravity
State the name of the response shown by the shoot of plant
Negative gravitropism
Suggest why the scientists do this.
To make sure they have a large enough population of the crops. Also to see if they are potentially any side effects of the geneticlaly engineered crop plants
cassava
Plasmid is taken from bacteria and cut with the same restricitioni enzyme as the gene from A thaliana to form sticky ends. Then using DNA ligase the gene is combined with the plasmid forming a re combinant plasmid. Later on this bacteria is used to infect cassava which will cause casvava to have more iron
used
Restriction enzyme
deficiency
Iron is found in red meat and spinach and green leafy vegetables. It is important because it is essential in formation of hameoglobin a red protein. The effects of a iron defienciency lead to anaemia in which due to a shortage of RBCs people becoe breathless often and do not have enough energy.
not
After 5 days the resources of the fermenter the resources in the fermenter such as glucose must have depleted and they were not enough resources to stusatin a population. There was too much competeiion between bacteria and many started dying. The rate of death was much greater than the rate of birth. They must have produced waste products like CO2 that made their environment too toxic to continue living in.
State the names of the stages of population growth of the bacteria labelled
Lag phase Log/exponential phase Stationary phase Death phase
the
Number of bacteria in 1.0 mm3 cube of nutrient solution Time in hours
insulin
Reduce blood sugar level by converting glucose into glycogen
caused
Type 1 Diabetes
organ
Pancreas
biotechnology
Rapidly reproduce ability to produce complex molecules precense of plasmids means we can genetically modify them easily no ethical issues
Suggest ways to reduce the quantity of plastic waste.
Re use and recycle plastic waste . Incenerate plsatic waste but with care as too not emit toxic gasses into the atmosphere.
Outline the dangers of non-biodegradable plastic waste to marine animals, such as
They can ingest this but its not biodegradable so their enzymes wont be able to digest plastic. Over time there stomach will fill up with plastic and they will be unable to eat real nutrioso food so they will die of starvation. They can get trapped in plastic and then die because of not being able to move around to collect resources.
feature shown by all reptiles that is
rouch scaly skin
and
Nitrogen fixation, deanmination, nitrification
differences between the structure of the yeast cell and the
Simimlarities both have ribosomes both have cell membrane both have cell wall both have cytpolasm
differences yeast cell has genetic material in nucleus w hile bacterial cell has circular loops of dna not enclosed in a nucleus yeast has mitochondrio which cell doesnt yeas has alarge vacuole which bacteria doesnt
State the other information that the student needs in order to calculate the magnification
The length of her drawing
millimetres
2000
kingdom that contains organisms that all have structure
Plant
.
noir
.
chien
.
A
.
F
.
D
.
E
.
B
of
Limewater
State where this change is detected
Thebrain detects the change in concentration in our blood by detecting a change in pH. Our breathing becomes heavier and more rapid in order to diffuse out all of the carbon dixoide
Explain the differences in composition between inspired and expired air.
Expired air has more carbon dioxide concentration then inspired air because that is a waste product of respiration and diffuses out of the blood. Expired ari has less oxygen concentration then inspired air because that is a reactant in respiration and diffuses into the blood. Expired air can sometimes be more moist and have more water vapour then inspired air because our gas exchange system is moist, it can also be warmer.
Describe and explain how the alveoli are adapted for gas exchange.
Alveoli are only 1 cell wall thick so this allows oxygen and carbon dioxide to easily diffuse across them. Alveoli have a large surface area which increaes the rate of diffusion and gas exchange. Alveoli are moist which helps with gas exchange. Alveoli have access to good ventilation systems to keep the concentration gradient high and increase the rate of diffusion and gasexchange
exchange
G
Outline how antibiotic resistance develops in a population of bacteria.
In a population of bacteria let us assume antibiotics is introduced. These bacteria naturally mutate and reproduce very quickly. Some of these bacteria by chance mutate to develop a gene thats resistance to the antibiotics. They survive and the rest of the bacteria die. The surviving population is very small but they all genes that make them resistance to said antibiotic, They then divide through mitosis producin perfect genetic copies of themselves and the population of the bacteria increases again but this time all of them have the resistive gene so the bacteria population is resistance to bacteria.
contains cilia to move mucus out of the airway
K pharynx
damage
ribs E
diaphragm
C,contracts to decrease pressure in the thorax
function
Prevent dust and pathogens from entering the gas exchange system
the
External intercostal muscles F
airway
cartillage J
destruction
Species that depend on their habitat have no shelters or homes to live in and therefore will be vulnerable to predators and the weather. Animals also will not have access to enough sources of food. The reduction in biodiversity may mean that some useful genes and plants which humans could have used will go extinct.
Describe how the data in Table 5.1 could be used to estimate the total area that was
For reach location ,find the average area burnt of each fire. This can be done using this formula estimated average duration of fire squared * estimated average expansion of the fire /2. Then multiply this by the total number of estiamted fires
Using the information in Table 5.1, compare the data for the two managed locations with
Managed land on average seem to have a lower average expansion rate of 0.3 compared to natural forests which have an non weighted average of 0.56 km. On average managed land fires seem to be shorter having a non weighted average of 3.6 while natural fires last longer having a non weighted average of 4.7 days. There doesntseem like the total number of fires is affected too much by wheter the land is managed or not because although natural boreal and temperate forests are have smaller number of fires than both the managed lands, natural savanah has many more fires than managed. Butin total there are more number of estimated natural fires
greenhouse
methane
natural process that releases carbon dioxide into the atmosphere.
Respiration
2 ................................................................................................................................................
decomposition of dead plants , denitrification, nitrogen fixation,
1 ................................................................................................................................................
nitrification
fetus
Bacteria are too large to diffuse through the placenta
Describe how the use of antibiotics can be managed to reduce the development of
Ensuring that a cycle of antibioitcs is completed and taken fully. only prescribing antibiotics when needed not for everysamll thing
strains
Because then if they infect humans they can act as pathogens and cause infectious diseases that can be harmful to human population.Also wemay have to develop new antibiotics to kill them but we can not keep doingthis forever
sequences
Because the bacteria strains could be otherwise indistinguishable and comparing genes is the best way to show evolutionary relationships. Perhaps the two bacterials look the same in all other aspects and ofcourse they will have the same cell structure, it may be very hard to tell them apart without specifically analzying their genes
molecule
The DNA molecule is arranged in a double helix structure. It has 2 sugar-phosphate backbones that are twissted to form this oduble helix structure. Connecting the two strands of sugar-phostphate backbone are bases. These bases always pair complmentary with A pairing with T and C pariing with G.
Predict how the water loss will differ from the trend shown in Fig. 3.2.
steeper line starting steeper ending earlier also.
Explain why the leafy shoot shown in Fig. 3.1 did
Because it had a large constant supply of watter in the form of the water beaker
Suggest why the mass of water in the apparatus does
Becaue even if the water evaporates inside the leaf, the concentration gradient is still equal as their 100% relative humidity which means the humidity, or concentration of water vapour molecules is the same outside the leaf as it is inside of leaf. So the water vapour will not diffuse as there is essentially no concentration gradient (the water is already as spread out as it can be)
Using the information in Fig. 3.2, describe
As temperature increases the rate of water loss increases in this speices of plant. First the rate of water loss only gradually increases but than at around 33 degrees the rate of water loss increaes more steeply and finally at 38 degrees the rate of water loss increases at the steepest highest rate. The rate of water loss is at a maximum at 45 Degrees and loses around 0.56 grams of water... Water is lost because of transpiration. The higher the temperature the higher the rate of transpiration as the rate of evaporation increases. Thsi is because water molecules on the surface of the mseophy cells have more kinetic energy (due to the increased temperature) and can therefore escape more easily and diffuse out through the stomato into the air in the form of water vapour.
the
12 hours is 43200 seconds.At a temperature of 35 degrees the plant loses.0.28 .... In 12 hours 1 m will lose .12096 grams of water
method that can be used to determine
Measure the inital volume in the burette and then the final volume in the burette and findteh difference.
burette
To prevent water from evaporating from the burette
water
To get rid of any air bubbles
water
Transpriation
intestine
on the surface of the villi of the duodenum
enzymes
Enzyme A is pepsin it is secreted by the walls of the stomach into the stomach. Its optimal pH is at 2. It breaks down proteins into polypeptides. It forms an ezyme substrate complex with proteins to catalyze their breakdown. It doesnt get changed in the process. But it gets denatured at pHs higher or lower than 2 as shown from in the graph. Enzyme B is trypsin it is made in the pancrease and secreted into the small intestine (duodenum) it further breaks down protein namely polypeptides into amino acids. Its optimum pH is 10 so that it doesnt get denatured in the alkaline bile.
molecules
Water
important
So that the they can be converted into smaller soluble moleculse. If they are soluble they can be assimilated by the body more easily and they can be transported and utlised more easily
mammals
Vertebrates
would
4 chambered heart placenta (in females)
(others, double circulatory system, milk production places, )
upper
G
incisors on lower jaw do not project forwards
D
project
C
Macropus
B
jaw
F
all teeth of similar shape
E
Equus
A
decay
When food is left on teath, bacteria feed on it. These bacteria secrete acidwhich dissolve the enamel in our teath causing tooth decay
the
Enamel
of
To aid in physical digestion, grind down food to make it into bolus so that its surface area increases.
Explain why an extremely high temperature is needed when forcing these two nuclei
Because they are usulaly repelled by eachother and dont want to react s we need high temperatures to force them to collide with such energy that they react