Question

The longer evolution acts on a population, the _______ variation in forms it can produce. Therefore, when searching for large evolutionary changes in species, biologists often need to search for evidence _______. Fossils can help biologists reconstruct evolutionary histories by revealing the forms of _______. _______ fossils can help biologists understand how new groups of organisms arose from very different organisms.

Answer 1

Answer:

1.—The (more) variations in forms it can produce.

2.—Biologists often need to search for evidence (in the distant past).

3.—By revealing the forms of (extinct species).

4.— (Intermediate) fossils can help biologists.....