What evidence was used to determine that the
last universal common ancestor of all life lived
about 4.3 million years ago?
a. fossils of prokaryotic cells
b. genome comparisons between all living
things
c. life found in meteorites
d. fossil cladistic analysis
e. more than one of these
B
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You read that two populations of hyena are different subspecies. How would these populations compare?
A) They could produce fertile offspring together. B) One group would be much larger than the other group. C) Their mating behavior would be quite different. D) They would have different diets.
For what reason might scientists change the most current classification system?
A) if more species became extinct B) if more types of vertebrates were discovered C) if more information became available on the evolutionary history of existing species D) if new species evolved
The pattern of flashes produced by fireflies is an example of visual communication
Indicate whether the statement is true or false
If you could travel in a time machine back to the Cambrian Explosion, which animals would you expect to see commonly? Check all that apply.
A. arthropods. B. birds. C. flatworms. D. sponges. E. reptiles.