The endosymbiotic theory states that

Most genetic variation is due to

Speciation cannot take place without

The random change of allele frequencies in a population is called

What are the sources of genetic variability?

When allele frequencies in a population remain constant, and evolution does not occur, this is referred to as

Evolution in a population has occured when

In a population of birds, it is an advantage to have a small beak to reach insects in crevices and it is also beneficial to have a large beak to crush seeds. It is a disadvantage to have an average beak size. This is an example of

The number of different genes that control a trait determine the

The weight of human infants at birth is under the influence of

One scientific hypothesis about the origin of life holds that

One reason common names are not useful to biologists is that they

What does a cladistic analysis show about organisms?

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