Q: A population of beetles has two alleles for color: B (black) and b (brown). If the frequency of B is 0.7 and b is 0.3, what is the expected frequency of heterozygotes under Hardy-Weinberg equilibrium?

$$2pq = 2 \times 0.7 \times 0.3 = 0.42$$

Question 1

Which of the following best describes genetic drift?

Accepted Answer

A random change in allele frequencies in a population, often having a larger effect in small populations.

Question 2

Which equation is used to calculate allele frequencies in a population under Hardy-Weinberg equilibrium?

Accepted Answer

$$p^2 + 2pq$$ + $$q^2 = 1$

Question 3

A population of beetles has two alleles for color: B (black) and b (brown). If the frequency of B is 0.7 and b is 0.3, what is the expected frequency of heterozygotes under Hardy-Weinberg equilibrium?

Accepted Answer

$$2pq = 2 	imes 0.7 	imes 0.3 = 0.42$$

Question 4

Which of the following is NOT a postzygotic isolating mechanism?

Accepted Answer

Temporal isolation

Question 5

Which statement best explains the biological species concept?

Accepted Answer

Species are groups of organisms that can interbreed and produce fertile offspring.

Question 6

Which of the following is an example of convergent evolution?

Accepted Answer

The development of wings in bats and birds for flight.

Question 7

Which supergroup includes organisms responsible for malaria and sleeping sickness?

Accepted Answer

Excavata

Question 8

Which feature distinguishes prokaryotes from eukaryotes?

Accepted Answer

Presence of membrane-bound organelles

Question 9

Which process is described by the endosymbiotic theory?

Accepted Answer

The origin of mitochondria and chloroplasts from free-living bacteria.

Question 10

Which of the following is a correct statement about Gram-negative bacteria?

Accepted Answer

They have an outer membrane containing lipopolysaccharides.

Question 11

Which of the following is a plausible consequence of antibiotic misuse in human medicine?

Accepted Answer

Development of antibiotic-resistant bacterial strains.

Question 12

Which equation would you use to determine the number of possible genotypes in a population with two alleles?

Accepted Answer

$$p^2 + 2pq$$ + $$q^2 = 1$

Question 13

A scientist observes that two species of frogs breed at different times of the year. What type of reproductive isolation is this?

Accepted Answer

Temporal isolation

Question 14

Which of the following is a direct observation supporting evolution?

Accepted Answer

The development of antibiotic resistance in bacteria.

Question 15

Which group contains organisms that gave rise to land plants?

Accepted Answer

Archaeplastida

Question 16

Which of the following is NOT a characteristic of prokaryotes?

Accepted Answer

Membrane-bound nucleus

Question 17

Which process is most responsible for the maintenance of polymorphism in a population?

Accepted Answer

Sexual selection

Question 18

Which of the following is a key difference between artificial selection and natural selection?

Accepted Answer

Artificial selection is driven by human choice, while natural selection is driven by environmental pressures.

Question 19

Which of the following is a correct interpretation of a phylogenetic tree?

Accepted Answer

Branch points represent common ancestors shared by descendant lineages.

Question 20

Which supergroup includes fungi and animals?

Accepted Answer

Unikonta

Evolution, Prokaryotes, and Protists: Study Guide and Learning Objectives

Study Guide - Practice Questions

Study Guide - Flashcards