17.3-4

Question 1

Struggle for existence

Answer 1

It is like competition. Animals fight and compete for resources. Populations produce more offspring than will survive. Only a small percentage do.

Question 2

Adaptation

Answer 2

A heritable(inherited) that increases an organisms ability to survive and reproduce in an environment. ie camouflage

Question 3

Fitness

Answer 3

How well an organism can survive and reproduce in its environment.

Question 4

Descent with modification

Answer 4

It is when an organism reproduces and over time the descendants will change through each generation. Changes are from common ancestors

Question 5

Natural selection

Answer 5

Organisms with the best fitness and traits will survive. Nature chooses.

Question 6

Biogeography

Answer 6

It is the study of past and present distribution or organisms.

Question 7

Homologous Structures

Answer 7

Structures that are similar in different species of common ancestry(descendent with modification)

Question 8

Analogous structures

Answer 8

Body parts that serve similar functions, but don’t share structure and development.