AP BIOLOGY

Detailed explanation-1: -D. fossil record. 5. Which word is defined as the same structure in different species indicating a common ancestor?

Detailed explanation-2: -Fossils document the existence of now-extinct species, showing that different organisms have lived on Earth during different periods of the planet’s history. They can also help scientists reconstruct the evolutionary histories of present-day species.

Detailed explanation-3: -Evidence for evolution: anatomy, molecular biology, biogeography, fossils, & direct observation. Key points: Evidence for evolution comes from many different areas of biology: Anatomy.

Detailed explanation-4: -Comparative embryology is the study of the similarities and differences in the embryos of different species. Similarities in embryos are likely to be evidence of common ancestry. All vertebrate embryos, for example, have gill slits and tails.

Detailed explanation-5: -The fossil record of whales, for instance, has a set of several well-defined members that lead inevitably to modern whales. Fossils have been found of coyote-sized semi-aquatic predators which were thought to live amphibious life-styles near the shore.