Chapter 16.3

Question 1

the sum of all the alleles and their distribution within the species

Answer 1

genetic variability

Question 2

Low genetic variability leads to _____ fitness.

Answer 2

low

Question 3

Homozygotes more likely to express mutant alleles.

Answer 3

True

Question 4

Homozygotes have narrower range of survivable environments.

Answer 4

True

Question 5

Homozygotes have narrower range of survivable environments.

Answer 5

True

Question 6

Rapid loss of genetic variability can lead to ______.

Answer 6

extinction

Question 7

Each jacket represents an allele. Which jacket picture represents the highest fitness for responding to a changing environment?

Answer 7

the heterozygote with one of each jacket

Question 8

related individuals mate

Answer 8

inbreeding

Question 9

more common in small populations

Answer 9

inbreeding

Question 10

change in the frequency of an allele that occurs by chance within a population.

Answer 10

Genetic drift

Question 11

Can be a process for evolutionary change

Answer 11

genetic drift

Question 12

detrimental for genetic diversity in small populations

Answer 12

genetic drift

Question 13

process in which small populations continue to decline in a cycle of problems leading to extinction

Answer 13

extinction vortex

Question 14

What was the cause of the population crash for Rufus Red Knot Shorebirds?

Answer 14

over harvesting of horseshoe crabs

Question 15

in the last 160 years, how many birds and mammals have gone extinct compared to the previous 250 years?

Answer 15

three times as many species

Question 16

Which trophic level would include a Dairy Cow?

Answer 16

primary consumer

Question 17

Which cause of extinction poses the most serious threat to biodiversity today?

Answer 17

degradation of habitat

Question 18

What type of symbiotic relationship benefits both the cleaner fish consuming parasites and the larger fish having the parasites removed?

Answer 18

mutualism