dead and broken branches
even in death organisms breed life, ex. carbon cycle
dead and broken branches
even in death organisms breed life, ex. carbon cycle
successful in life, they will generally go on multiplying in number as well as diverging in character
This remind me of how mammals came to be, not just mammals, but the other classes that led to mammals
individuals be capable of there supporting themselves.
And in a way it supports more diversity in the whole ecosystem
that is, if they vary—for otherwise natural selection can do nothing
diversity is everything!! Without it we risk losing species
largeness of area
could this be because there is a greater capacity to hold them? For a time they might not struggle as much because variations might help partition niches
prevented
this kind of sounds like speciation
om one district
The environment makes a big difference as far as variation goes
useless to each other
they have their own mechanisms for avoiding inbreeding
pea-family
Gregor Mendel showed us some pretty important things here too
dividuals presenting mutual and slightly favourable deviations of structure
This can almost become a dependence though and wouldn't one say that would be bad? Because if the bees were to be wiped out then wouldn't the flowers be too? Or would they adapt, and other varieties become more dominant?
fertility of clover greatly depends on bees visiting and moving parts of the
is this in a way signs of coevolution?
Catskill Mountains
They were here :'(
parent-form of wolf
this variety would add to the survival of the species as a whole
infinitely better adapted
This is such a great question!! Would any domesticated species survive in Nature? Probably not, but there could be exceptions
, and this would manifestly be favourable to natural selection, by giving a better chance of profitable variations occurring
By having more variation in a gene pool Natural Selection has more to act on and greater chances of species survival
affect many of the others.
That's how entwined life is
fluctuating element
Can we thing of any in nature?
principle of selection
Artificial vs Natural
competition cease
because so few organisms have adapted to persist
extinct or very rare
:'(
extinction of an organic being
when we are the cause of mass extinctions taking place
epidemics
we are living it too!
extreme cold or drought
seems characters are better suited for surviving than others
A large number of eggs is of some importance to those species,
could this be reference r (more offspring to increases the chances of having ones that survive) vs k selected species,
thousands are annually slaughtered for food
they are also plagued by disease on occasion, and their health is compromised so much because of their close quarters and diets (not all agr. industries treat them like this, but it's disgusting the way some do)
rapid increase and wide diffusion of naturalised productions in their new homes.
Is this talking about invasive species?
world would not hold them
carrying capacity
food may be now superabundant
the struggle for resources
Natural Selection
that's the driving force
beautiful adaptations
These two words just called out because it truly is amazing at the grandeur of forms that life has taken, reminds me of the Bryson reading on how everything that makes us up doesn't really care or even know that we exist but still works towards it
how species arise in nature
In the Grant video about Darwin's Finches they delve into this, how are species formed?
the species of that genus present a number of varieties, that is of incipient species, beyond the average
What's crazy is that now we can get an idea of how many varieties there can be, or what the varieties are through genetics
inherit those advantages
I forgot the actual phrase but this reminds of how present organisms have evolved with characters that were necessary for the the past, whether they serve the present well or not has to do with a bunch of factors - something of that sort it was from Diversity of life
as steps leading to more strongly marked
Quite deductive
Mr. Babington gives 251 species, whereas Mr. Bentham gives only 112,—a difference of 139 doubtful forms!
I wonder, is there a place where you can look and see if what constitutes a species and a "variety"? It seems very subjective.
finding variability in important characters
Even with important characters like organs, we might all have a similar "code", but it doesn't mean we all express it the same way.
considerable deviation of structure in one part, either injurious to or not useful to the species, and not generally propagated.
Whether it be sexual selection or survival of the fittest (or other hypotheses) that makes it that way