Chapter 12.3 review PP

Question 1

Only traits present in the population can be acted upon.

Answer 1

Subtleties of natural selection

Question 2

The presence of one adaptation may result in the loss of a slightly less valuable trait

Answer 2

Subtleties of natural selection

Question 3

Results in the fit of an organism to the current environment

Answer 3

Subtleties of natural selection

Question 4

Natural can or cannot cause new traits?

Answer 4

Cannot

Question 5

Organisms do not change to survive just because they “should”.

Answer 5

True

Question 6

Traits that influence survival must already be present in the population.

Answer 6

True

Question 7

Organisms become a better fit to their environment and they are fit for certain situations but not all.

Answer 7

True

Question 8

Beneficial adaptation for one situation might be a liability in another.

Answer 8

True

Question 9

Adaptations are constrained by what?

Answer 9

Underlying biology

Question 10

Panda’s “thumb” and Bipedal walking are examples of what ?

Answer 10

adaptations

Question 11

Natural selection doesn’t cause progression toward a goal.

Answer 11

True

Question 12

Different environmental conditions can lead to different change sin populations

Answer 12

Patterns of selection

Question 13

changes in a population in a particular direction.

Answer 13

Directional selection

Question 14

Population stabilizes; changes are resisted

Answer 14

Stabilizing selection

Question 15

Changes in a population result in two or more variants

Answer 15

Diversifying selection

Question 16

What does “survival of the fittest” really mean?

Answer 16

The organisms best adapted to the environment will survive

Question 17

Primary classification group with most closely related members

Answer 17

Species

Question 18

Describes a group of individuals that can interbreed and produce fertile offspring

Answer 18

The biological species concept

Question 19

Cannot reproduce fertile offspring with members of other species. This is an example of the ?

Answer 19

Biological species concept

Question 20

Difficult to apply to fossils or organisms with asexual reproduction. This is an example of what?

Answer 20

Biological species concept

Question 21

Sum total of the alleles found in all individuals of a species

Answer 21

Gene pool

Question 22

Changes in the frequency of an allele in a gene pool can only occur with a what?

Answer 22

Biological species

Question 23

The spread of an allele throughout a species’ gene pool

Answer 23

Gene flow

Question 24

If organisms are evolving,

Answer 24

they are changing

Question 25

how unique genes are created

Answer 25

mutations

Question 26

A change to the DNA sequence

Answer 26

Mutation