Chapter 13 Review

The location in which fossils appear in the sedimentary layers is used to piece together an evolutionary sequence of life on Earth called __________________________________.

___________________ increase an organism’s chance of survival in their environment.

Who started the theory of natural selection?

_____________________________ occurs when the environment changes and the adaptations of a species are no longer sufficient for its survival

What are some causes for extinction?

_____________________________ share common evolutionary origins, but can be functionally unalike.

_____________________________ is a process by which organisms with favorable traits survive and reproduce more successfully.

Animals with backbones

__________________ are typically found in sedimentary rock and offer clues into evolutionary history

_____________________________ is used by biologists to illustrate evolutionary relationships between organisms and their ancestors.

Why are there gaps in the fossil record?

As environmental conditions change over time, which population will have a better chance of survival?

Greater _____________________________ signifies a larger variety of alleles, and therefore greater survivability of a species over time.

_____________________________ is the process of how organisms acquire adaptations over time.

Do changes in the environment CAUSE mutations?

_____________________________ is an organism from which others have descended.

Occur randomly and produce variation in a population