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What does “survival of the fittest” really mean?

Older rock layers contain fossils of “simpler” life forms indicating evolutionary history from simple to more complex forms of life.

The discovery that the brain contains specific receptors for manufactured opiate drugs such as morphine implies that the body must make an _______ substance to interact with the same receptors.

What does “survival of the fittest” really mean?

Older rock layers contain fossils of “simpler” life forms indicating evolutionary history from simple to more complex forms of life.

Speciation occurs at a slow, steady pace, as traits change incrementally. What type of process of speciation does it represent?

Which is NOT a benefit of the understanding of evolution to understanding the field of biology?

The accompanying graph shows an association between the number of nests and male tail length in long-tailed widowbird. This represents an example of __________________.

Which trait would be considered a vestigial trait?

Which trait would be considered a vestigial trait?