Week 8 Evolution Worksheet Answer Key.pdf. Define the "theory of evolution" as it is currently understood in biology. In its broadest form, this theory holds that all of life on Earth descended from a single ancestral species, and that the difference seen among species today represent the accumulation of many microevolutionary changes over many millions of years.
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Web Sample answer: The bird is eating the yellow insect. This is probably because it was easier to see and catch than the green one,.
