Ch 3.1

Question 1

Differences in the gene frequencies within a population from one generation to the next is known as

Answer 1

Evolution

Question 2

T/F- the variety of life on Earth is due to natural selection

Answer 2

True

Question 3

T/F- Individuals do not evolve; populations do

Answer 3

True

Question 4

When individuals within a population are genetically different from one another this is known as what type of pressure

Answer 4

Selective Pressure

Question 5

A nonrandom influence that affects who survives or reproduces is known as

Answer 5

Selective Pressure

Question 6

stretches of DNA, the hereditary material of cells, that each direct the production of a particular protein and influence an individual’s traits is known as

Answer 6

Genes

Question 7

variants of genes that account for the diversity of traits seen in a population is known as

Answer 7

Alleles

Question 8

Individuals with certain genetic traits are known as

Answer 8

Adaptations

Question 9

the process by which organisms best adapted to
the environment (the fittest) survive to reproduce, leaving more offspring than less well-adapted individuals this is known as

Answer 9

Natural Selection

Question 10

The primary driving force of evolution is

Answer 10

Natural Selection

Question 11

What type of variation exists in the population where individuals possess inherited differences is known as

Answer 11

Genetic Variation

Question 12

What is it called when not everyone will survive to reproduce

Answer 12

Differential Reproductive Success

Question 13

differences in the gene frequencies within a population
from one generation to the next is known as

Answer 13

Evolution

Question 14

the assortment and abundance of particular variants of genes relative to each other within a population is known as

Answer 14

Gene Frequencies

Question 15

What are the three types of evolved selections

Answer 15

Stabilizing
Directional
Disruptive

Question 16

What type of selection favors the norm and selects against extremes

Answer 16

Stabilizing Selection

Question 17

What type of selection continually favors a particular extreme of a trait

Answer 17

Directional Selection

Question 18

What type of selection favors the extremes but selects against the intermediate forms

Answer 18

Disruptive Selection

Question 19

T/F- Genetic diversity in a population is the raw material on which natural selection operates.

Answer 19

True

Question 20

T/F- The more diverse a population, the more likely there will be individuals present who can withstand or even thrive if environmental conditions change

Answer 20

True

Question 21

T/F- The ability of a population to adapt is largely dependent on its genetic diversity

Answer 21

True

Question 22

the heritable variation
among individuals of a
single population or
within a species as a
whole is known as

Answer 22

Genetic Diversity

Question 23

What are the two main sources genetic variation comes from

Answer 23

Mutation
Genetic recombination

Question 24

A change in the DNA sequence of sex cells that alters a gene is known as

Answer 24

Mutation

Question 25

T/F- Mutations can be neutral, beneficial, or harmful

Answer 25

True

Question 26

the production of eggs and sperm results in a shuffling of alleles, which creates new combinations in offspring is known as

Answer 26

Genetic Recombination

Question 27

Two species can become highly adapted to one another
when each becomes the selective pressure that favors certain traits in the other, a process known as

Answer 27

Coevolution

Question 28

T/F- Species that never coevolved with a particular predator or competitor may not have the traits needed to survive if that species invades their habitat

Answer 28

True

Question 29

a special type of natural selection in which two species
each provide the selective pressure that determines which traits are favored by natural selection in the other this is known as

Answer 29

Coevolution

Question 30

What is an example of coevolution

Answer 30

Predator and prey species

Question 31

the change in gene frequencies of a population over time due to random events that result in the loss of some gene variants is known as

Answer 31

Genetic Drift

Question 32

the situation that occurs when population size is drastically reduced, leading to the loss of some genetic variants, and
resulting in a less diverse population this is known as

Answer 32

Bottleneck Effect

Question 33

The situation that occurs when a small group with only a subset of the larger population’s genetic diversity becomes isolated this is known as

Answer 33

Founder Effect

Question 34

T/F- In artificial selection, humans choose which traits to
keep and which to eliminate from a population through selective breeding. Our actions have also inadvertently led to the evolution of antibiotic- or pesticide-resistant populations

Answer 34

True

Question 35

a process in which humans decide which individuals breed and which do not in an attempt to produce a population with desired traits is known as

Answer 35

Artificial Selection

Question 36

T/F- The pace of evolution and extinction is generally slow and is affected by population size, genetic diversity, reproductive rate, generation time, and the strength of the selective pressures at play.

Answer 36

True

Question 37

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