Question 1

Which of the following best describes the concept of 'descent with modification' as proposed by Darwin?

Accepted Answer

Every species, living or extinct, must have descended by reproduction from preexisting species, and those species can change over time.

Question 2

Which equation correctly represents the components of phenotypic variance in a population?

Accepted Answer

$$V_P = V_G + V_E + V_{GE} + V_{error}$$

Question 3

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

Accepted Answer

All individuals in a population are genetically identical

Question 4

A population of beetles is isolated on an island, and over time, the frequency of a rare allele increases due to random chance. Which evolutionary mechanism is most likely responsible?

Accepted Answer

Genetic drift

Question 5

Which of the following best illustrates the concept of homology?

Accepted Answer

The forelimbs of a human, cat, whale, and bat, which share similar bone structures

Question 6

Which process can increase genetic diversity in a population by introducing new alleles from another population?

Accepted Answer

Gene flow

Question 7

Which of the following is an example of convergent evolution (analogy)?

Accepted Answer

The similar body shapes of dolphins (mammals) and sharks (fish)

Question 8

Which of the following best describes the Biological Species Concept (BSC)?

Accepted Answer

A species is a group of populations whose members have the potential to interbreed and produce viable offspring.

Question 9

Which mechanism of speciation involves the geographic isolation of populations?

Accepted Answer

Allopatric speciation

Question 10

Which of the following is a plausible outcome of a population bottleneck event?

Accepted Answer

Loss of rare alleles and reduced genetic diversity

Question 11

Which of the following is an example of evolution by horizontal gene transfer?

Accepted Answer

A bacterium acquiring antibiotic resistance genes from another bacterium

Question 12

Which of the following best explains why antibiotic resistance can spread rapidly among bacterial populations?

Accepted Answer

Horizontal gene transfer allows resistant genes to move between different bacteria.

Question 13

Which of the following is NOT a part of the Linnaean system of classification?

Accepted Answer

Clade

Question 14

Which of the following statements about natural selection is correct?

Accepted Answer

Natural selection acts on individuals, but only populations evolve.

Question 15

Which of the following best describes the difference between homology and analogy?

Accepted Answer

Homology refers to similarity due to common ancestry, while analogy refers to similarity due to shared function but independent origins.

Question 16

Which of the following is an example of microevolution?

Accepted Answer

A change in allele frequencies for beak size in a population of finches over several generations

Question 17

Which of the following is a key observation that led Darwin to propose his theory of evolution by natural selection?

Accepted Answer

There is an amazing diversity of life, and organisms share characteristics and are suited to their environments.

Question 18

Which of the following best describes the process of sympatric speciation?

Accepted Answer

Speciation that occurs within a single population, often due to genetic changes such as polyploidy.

Question 19

Which of the following is a correct example of binomial nomenclature?

Accepted Answer

Homo sapiens

Question 20

Which of the following statements about genetic drift is true?

Accepted Answer

Genetic drift can lead to the loss of alleles in small populations.

Week 3 - Evolution, Speciation, and Phylogenetics: Foundations of Biological Diversity

Study Guide - Practice Questions

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