Question 1

Which of the following best defines evolution as described in the study materials?

Accepted Answer

Genetic changes in populations of organisms through time that lead to differences among them.

Question 2

According to Darwin’s theses in 'The Origin of Species,' which statement is NOT one of the main points?

Accepted Answer

Individuals evolve new traits in response to environmental changes.

Question 3

Which of the following is necessary for natural selection to occur in a population?

Accepted Answer

There must be heritable variation in traits.

Question 4

In the classic peppered moth scenario, what was the primary reason black moths became more common after tree trunks darkened?

Accepted Answer

Black moths were better camouflaged and survived predation more often.

Question 5

Why can antibiotic resistance spread rapidly in bacterial populations?

Accepted Answer

Bacteria can transfer resistance alleles between cells and species via conjugation.

Question 6

Which of the following is a correct statement about natural selection?

Accepted Answer

Natural selection acts on populations, not individuals.

Question 7

A population of weeds is exposed to an herbicide. A few individuals survive due to a resistant genotype. What will likely happen over several generations?

Accepted Answer

The population will become more resistant as resistant individuals reproduce.

Question 8

Which of the following is NOT a solution to antibiotic resistance?

Accepted Answer

Using antibiotics in agriculture that are also used for human disease.

Question 9

What is the key criterion for defining two groups as different species according to the biological species concept?

Accepted Answer

They are reproductively isolated and cannot produce fertile offspring together.

Question 10

Which of the following is an example of a reproductive isolating mechanism?

Accepted Answer

Two populations breed at different times of the year.

Question 11

Why would evolution NOT occur in a population where all individuals have the same genotype and mutations never happen?

Accepted Answer

There would be no genetic variation for selection to act upon.

Question 12

Which of the following best describes an allele?

Accepted Answer

A version of a gene that may produce different traits.

Question 13

Which step is NOT part of the process of speciation?

Accepted Answer

Individuals intentionally change their genes.

Question 14

Which of the following equations best represents the process of bacterial division?

Accepted Answer

$$N_t = N_0$ 	imes 2^n$$

Question 15

If a population of bacteria is exposed to an antibiotic and only those with a resistance allele survive, what will happen to the frequency of the resistance allele in the next generation?

Accepted Answer

It will increase.

Question 16

Which of the following statements about natural selection is FALSE?

Accepted Answer

Natural selection has a predetermined goal.

Question 17

A scientist observes that two populations of frogs use different mating calls and do not interbreed, even though they live in the same area. What type of reproductive isolating mechanism is this?

Accepted Answer

Behavioral isolation

Question 18

Which of the following best explains why taking all prescribed antibiotics is important in preventing antibiotic resistance?

Accepted Answer

It ensures all bacteria, including resistant ones, are eliminated.

Question 19

Which of the following is a real-world example of natural selection caused by human activity?

Accepted Answer

The evolution of antibiotic resistance in bacteria.

Question 20

Which of the following is NOT an example of a reproductive isolating mechanism?

Accepted Answer

Migration between populations

Evolution, Natural Selection, and the Origin of Biodiversity

Study Guide - Practice Questions

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