Question 1

Which of the following best describes Darwin's concept of natural selection?

Accepted Answer

Populations evolve as individuals with favorable traits survive and reproduce more successfully.

Question 2

A population of insects is exposed to a new pesticide. After several generations, most of the population is resistant to the pesticide. Which process best explains this outcome?

Accepted Answer

Natural selection, because individuals with resistance survived and reproduced.

Question 3

Which of the following is NOT a requirement for natural selection to occur in a population?

Accepted Answer

Unlimited resources in the environment.

Question 4

Which of the following scenarios is an example of the founder effect?

Accepted Answer

A small group of birds is blown to a new island, and their descendants show different gene frequencies than the original population.

Question 5

Which of the following best illustrates the concept of a reproductive barrier?

Accepted Answer

Two species of frogs breed at different times of the year and do not interbreed.

Question 6

Which of the following is a correct interpretation of the fossil record as evidence for evolution?

Accepted Answer

Fossils reveal an ordered appearance of life, with transitional forms linking major groups.

Question 7

Which of the following mechanisms would most likely increase genetic similarity between two populations?

Accepted Answer

Gene flow

Question 8

A scientist discovers two populations of beetles that look identical but cannot produce fertile offspring when crossed. According to the biological species concept, these populations are:

Accepted Answer

Different species, because they are reproductively isolated.

Question 9

Which of the following is an example of artificial selection?

Accepted Answer

Humans breeding dogs for specific traits such as size or coat color.

Question 10

Which of the following statements about evolution is FALSE?

Accepted Answer

Evolution always leads to more complex organisms.

Question 11

Which of the following best describes the difference between microevolution and macroevolution?

Accepted Answer

Microevolution refers to changes within a population's gene pool over generations, while macroevolution involves large-scale changes such as the formation of new species.

Question 12

Which of the following is an example of allopatric speciation?

Accepted Answer

A river forms and splits a population of rodents, leading to the evolution of two distinct species.

Question 13

Which of the following is NOT a domain in the taxonomic hierarchy?

Accepted Answer

Animalia

Question 14

Which of the following best explains why peacocks have long, colorful tails, despite the increased risk of predation?

Accepted Answer

Sexual selection favors males with elaborate tails because they attract more mates.

Question 15

Which of the following is the correct order of taxonomic ranks from broadest to most specific?

Accepted Answer

Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species

Question 16

Which of the following is a real-world example of gene flow?

Accepted Answer

Pollen from one population of wildflowers fertilizes plants in a distant population, introducing new alleles.

Question 17

Which of the following statements about phylogenetic trees is TRUE?

Accepted Answer

Phylogenetic trees represent hypotheses about evolutionary relationships among species.

Question 18

Which of the following is an example of a postzygotic reproductive barrier?

Accepted Answer

Hybrid offspring of two species are sterile and cannot reproduce.

Question 19

Which of the following best describes the process of adaptation?

Accepted Answer

The accumulation of favorable traits in a population over time due to natural selection.

Question 20

Which of the following events is associated with the Cenozoic era?

Accepted Answer

Diversification of mammals following the extinction of dinosaurs.

Chapter 7: Darwinian Evolution – Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard