_________ traits are newly evolved features, such as feathers, that did not appear on previous ancestors.
According to the principles of natural selection this states that __________ are inherited.
Structures can be used for the same purpose and can be superficially similar but are not inherited.
The evolution process that occurs in small, gradual steps.
A record of species that lived long ago.
This type of selection splits a population into two groups.
___________ Principle states that when allelic frequencies remain constant, a population is in genetic equilibrium.
The measure of the relative contribution an individual trait makes to the next generation.
An early pre-birth stage of an organism's development.
Any change in allelic frequencies in a population that is due to chance.
This form of selection operates to eliminate extreme expressions of a trait.
This selection process is also known as selective breeding.
Anatomically similar inherited from a common ancestor.
Down
Structures that are reduced forms of functional structures in other organisms.
Morphological adaptations that allow animals to blend in within their environments.
This selection theory states that "only the strongest will survive".
One species evolves to resemble another species.
This occurs when a small sample of a population settles in a location separated from the rest of the population.
The study of the distribution of plants and animals around the world.
This type of selection occurs in populations when males and females differ significantly.
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