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'Macro-evolution' is not a process in itself. Rather, it is a perspective on the effects of evolution. 'Micro-evolution' is those effects seen from close-up; by 'zooming out' one sees those same results in a wider scope called 'macro-evolution'. All evolution is driven by genetic variation and natural selection.
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∙ 9y ago
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Does natural selection act on genotypes?
Indirectly, yes it does. But it can only act on genotypes through their phenotypes.
Natural selection can only act upon a certain trait if the trait is?
heritable
Why does the environment act on natural selection?
I know of no government that acts, in any direct or significant way, on natural selection.
Can natural selection act upon body shape?
Yes, that would be called the Homologous structure, and that changes in natural selection.
Can natural selection occur without variation in a population?
no there is no genetic variation for natural selection to act upon
What does natural selection only act on?
It acts on populations.
Does natural selection act on genotypes?
Indirectly, yes it does. But it can only act on genotypes through their phenotypes.
Natural selection can only act upon a certain trait if the trait is?
heritable
Is inheritance a requirement for natural selection?
Yes it does. Without variance in the organisms genome, that gives variance to the phenotype, there would be nothing for natural selection to select from.
Does natural selection act on the phenotype?
yes
Why does the environment act on natural selection?
I know of no government that acts, in any direct or significant way, on natural selection.
Can natural selection act upon body shape?
Yes, that would be called the Homologous structure, and that changes in natural selection.
What is the only thing that natural selection can act on?
The phenotype or genome of the individual organism. Remember, individuals are selected, populations evolve.
Can natural selection occur without variation in a population?
no there is no genetic variation for natural selection to act upon
Why does natural selection act on the phenotype and not the genotype?
in need helpl asap
Can natural selection act upon sperm cells?
From the papers I am reading there may be mechanisms to insure only top quality sperm make it into the ejaculate.
Why is crossing-over one of the factors that makes natural selection possible?
Crossing-over increases the genetic variation within a population, which is required for natural selection to act upon.
