Natural Selection

Question 1

A ______ can be described by the traits present and by the number of individuals who have each trait. (1.3)

Answer 1

population

Question 2

The ________ of individuals with each trait in a population can change over time. (1.4)

Answer 2

number

Question 3

Over many generations, individuals with _______ traits become more common in a population, while individuals with non-adaptive traits become less common.

Answer 3

adaptive

Question 4

The traits that exist in a population determine which traits can become more _______ over many generations.

Answer 4

common

Question 5

Whether or not a trait is _______ depends on the environment.

Answer 5

adaptive

Question 6

Biologists analyze data about environmental conditions (the causes) to explain changes in the ________ of traits in populations (the effects)

Answer 6

distribution

Question 7

______ are instructions for making protein molecules and protein molecules determine an organism’s traits.

Answer 7

Genes

Question 8

Individuals inherit their genes from their ______. Genes, and therefore traits, in a population are passed down from generation to generation

Answer 8

parents

Question 9

Individuals with adaptive traits are more likely to live longer and have _____; individuals with_______ traits are more likely to die without having offspring.

Answer 9

offspring, non-adaptive

Question 10

_____ are changes to genes that can lead to changes to protein molecules, which can result in changes to traits. (3.2)

Answer 10

Mutations

Question 11

Mutations to genes can sometimes introduce new _____ into a population. (3.2)

Answer 11

traits

Question 12

A new trait will only become more common in a population if it is _____. (3.3)

Answer 12

adaptive