Chapter 9.1 Vocabulary

Question 1

Define evolution

Answer 1

The process of gradual change in a species over time

Question 2

Define fossil

Answer 2

Preserved remains of ancient organisms

Question 3

Define adaptation

Answer 3

A trait that helps an organism survive and reproduce

Question 4

Define natural selection

Answer 4

The process by which individuals that are better adapted to their environment are more likely to survive and reproduce than other members of the same species.

Question 5

Define overproduction

Answer 5

Most species produce far more offspring than can possible survive. Many do not survive due to limited resources (food, water, living space)

Question 6

Define competition

Answer 6

Usually NOT DIRECT competition between members of a species.
More INDIRECT competition over limited resources.

Question 7

Define variation.

Answer 7

Any difference in traits between individuals of the same species.

Question 8

What is a scientific theory?

Answer 8

A well-tested concept that explains a wide range of observations.