Question 1

Which of the following best explains why Darwin's theory of evolution by natural selection is more widely accepted than Lamarck's theory of acquired characteristics?

Accepted Answer

Darwin's theory is supported by evidence from genetics and fossil records, while Lamarck's theory lacks empirical support.

Question 2

Which of the following is an example of artificial selection?

Accepted Answer

Breeding dogs to enhance herding behavior over several generations.

Question 3

A population of birds is observed to have a wide range of beak sizes. Over time, only birds with either very small or very large beaks survive, while those with intermediate beak sizes decrease in frequency. Which type of selection is occurring?

Accepted Answer

Disruptive selection

Question 4

Which of the following best describes the bottleneck effect?

Accepted Answer

A sharp reduction in the size of a population due to a random event, leading to a loss of genetic diversity.

Question 5

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

Accepted Answer

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

Question 6

Which of the following is an example of a homologous structure?

Accepted Answer

The forelimbs of whales, bats, and humans, which have different functions but similar bone structures.

Question 7

Which of the following best defines a gene pool?

Accepted Answer

All the alleles present in a population at a given time.

Question 8

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

Accepted Answer

Natural selection

Question 9

Which of the following is the most accurate evidence for the evolution of common descent among species?

Accepted Answer

Comparative DNA (molecular biology)

Question 10

Which of the following scenarios best illustrates coevolution?

Accepted Answer

A species of flower evolves deeper nectar tubes while its pollinator moth evolves a longer proboscis.

Question 11

Which of the following is an example of a vestigial structure in humans?

Accepted Answer

The appendix

Question 12

Which of the following best describes the founder effect?

Accepted Answer

A small group of individuals establishes a new population, leading to reduced genetic variation.

Question 13

Which of the following is an example of convergent evolution?

Accepted Answer

The wings of bats and the wings of insects, which serve similar functions but evolved independently.

Question 14

Which of the following is NOT a driving force of natural selection according to Darwin's observations?

Accepted Answer

Random mating

Question 15

In the classic peppered moth experiment, what was the primary selective pressure that led to the increase in dark-colored moths during the Industrial Revolution?

Accepted Answer

Predation by birds on more visible moths

Question 16

Which of the following equations represents the Hardy-Weinberg equilibrium for allele frequencies in a population?

Accepted Answer

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

Question 17

Which of the following is an example of sexual dimorphism resulting from sexual selection?

Accepted Answer

Male peacocks have large, colorful tails while females are brown and less conspicuous.

Question 18

Which evolutionary theory states that geological processes have been uniform throughout Earth's history and continue to operate today?

Accepted Answer

Uniformitarianism

Question 19

A scientist finds a fossil that shows characteristics of both fish and amphibians. What is this fossil an example of?

Accepted Answer

A transitional fossil

Question 20

Which of the following best explains why antibiotic resistance in bacteria can evolve rapidly?

Accepted Answer

Bacteria have short generation times and high mutation rates, allowing beneficial mutations to spread quickly.

Evolution: Key Concepts and Evidence – Study Guide

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