Chapter 8.2: Sources of Evidence for Evolution

Question 1

fossil evidence

Answer 1

Fossils in younger (and usually closer to the surface) rock are more similar to current species than those in deeper strata.

Question 2

biogeographic evidence

Answer 2

-Geographically close environments are more likely to be
populated by related species.
-Animals found on islands often closely resemble animals on the
nearest continent.
-Fossils of the same species can be found
on the coastlines of neighbouring continents.

Question 3

anatomical evidence

Answer 3

• homologous structures

- analogous structures

Question 4

embryology evidence

Answer 4

Generally, related species share common embryological stages and timings of structural development.

Question 5

molecular evidence

Answer 5

Species that have similar DNA share a common ancestor.