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When two groups evolve in different directions as they adapt to different environments, and eventually they do not reproduce with each other, so they are considered different species, we call this _____ evolution.

__________ is the movement of alleles between populations such as by the migration of breeding individuals.

Rose thorns are an example of ____________________ defense mechanism.

  The Hardy-Weinberg principle states that the allele frequencies in a gene pool will remain in _____ as long as five conditions are met.

Species adapted to stable and predictable environments, with small numbers of large offspring, that provide a lot of resources or parental care to offspring are known as _____ species.

Egrets perch on the backs of cattle while they graze.  The birds eat insects that the cows stir up, while the cows are neither harmed not helped. What term describes this relationship?

__________________________ are anatomical features that are fully developed and functional in one group of organisms but reduced and have no function in a similar group. _______

Embryological evidence for evolution is demonstrated because at some time during development all vertebrates have _____.

Which evidence for evolution uses plants and animals trapped in rock strata?  

Give an example of a secondary consumer, indicating the reason you call it a secondary consumer.