Question 1

Evolution occurs in ________.

Accepted Answer

The answer of Evolution occurs in ________....

Question 2

Antibiotic resistance is an example of ________ in bacteria.

Accepted Answer

The answer of Antibiotic resistance is an example of ________...

Question 3

What causes evolutionary change in a small population?

Accepted Answer

The answer of What causes evolutionary change in a small...

Question 4

According to the mathematical equation used in the Hardy-Weinberg principle, if the alleles for a certain trait in a population are A1 and A2, then the proportion of individuals with the genotype ________ is represented by 2pq.

Accepted Answer

The answer of According to the mathematical equation used in...

Question 5

How does the founder effect influence the frequency of alleles in a population?

Accepted Answer

The answer of How does the founder effect influence the...

Question 6

Natural selection causes genetic changes in an individual. True or False?

Accepted Answer

Natural selection acts on existing genetic variation within a population, favoring individuals with advantageous traits, but it does not cause genetic changes in an individual.

Question 7

Suppose a small population of deer is introduced to an island. All the original males have 6 to 10 points on their antlers, and the average male has 8 points. After several generations, if most males have antlers with 10 points and no males have 6 points, this is an example of ________ selection.

Accepted Answer

The answer of Suppose a small population of deer is...

Question 8

What conditions are necessary for a population to be at equilibrium?

Accepted Answer

The answer of What conditions are necessary for a population...

Question 9

A bird comes in a range of phenotypes, from white through gray to black. Disruptive selection favors the gray phenotype. True or False?

Accepted Answer

Disruptive selection favors extreme phenotypes at both ends of the spectrum, not the intermediate phenotype like gray.

Question 10

Explain why new mutations appear frequently in bacterial populations but infrequently in human populations.

Accepted Answer

The answer of Explain why new mutations appear frequently in...

Question 11

Explain how disruptive selection could lead to the development of two species from one original founding population.

Accepted Answer

The answer of Explain how disruptive selection could lead to...

Question 12

Evolution can be defined as change in ________ in a population.

Accepted Answer

The answer of Evolution can be defined as change in...

Question 13

A city was intensively sprayed with the chemical DDT to control houseflies. The number of houseflies was immediately greatly reduced. Each year thereafter, the city was sprayed again, but the flies gradually increased in numbers until 10 years later they were as abundant as they were before the control program began. Provide an evolutionary explanation of what happened.

Accepted Answer

The answer of A city was intensively sprayed with the...

Question 14

A population with ________ is at risk for extinction.

Accepted Answer

The answer of A population with ________ is at risk...

Question 15

Explain how a recessive trait can be the most frequent phenotype in a population.

Accepted Answer

The answer of Explain how a recessive trait can be...

Question 16

Individuals who have one dominant allele and one recessive allele for a trait are referred to as ________.

Accepted Answer

The answer of Individuals who have one dominant allele and...

Question 17

Natural selection acts on phenotypes to affect the evolution of ________.

Accepted Answer

The answer of Natural selection acts on phenotypes to affect...

Question 18

Environmental change causes the heritable variations in individuals that natural selection acts upon. True or False?

Accepted Answer

Heritable variations are caused by genetic mutations and recombination, not directly by environmental changes. Environmental change can influence which variations are advantageous, thus affecting natural selection.

Question 19

A population that maintains several different phenotypes displays ________.

Accepted Answer

The answer of A population that maintains several different phenotypes...

Question 20

Evolutionary adaptations are not always the "best" solution to a problem. Explain how the long necks of giraffes can be both advantageous and disadvantageous.

Accepted Answer

The answer of Evolutionary adaptations are not always the "best"...

Quiz 15: How Populations Evolve