Question 1

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

Accepted Answer

Species change over generations, giving rise to new species while sharing a common ancestor.

Question 2

Which mechanism is primarily responsible for adaptive evolution in populations?

Accepted Answer

Natural selection

Question 3

A population of snails is exposed to a new predator. Over several generations, the frequency of thicker shells increases. Which evolutionary process is most likely responsible for this change?

Accepted Answer

Natural selection

Question 4

Which of the following is the best definition of a biological species according to the Biological Species Concept?

Accepted Answer

A group of organisms that can interbreed and produce fertile offspring.

Question 5

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 6

A population of ferrets experiences a drastic reduction in size due to a natural disaster. The resulting population has reduced genetic diversity. This is an example of:

Accepted Answer

Bottleneck effect

Question 7

Which of the following best describes the relationship between systematics and taxonomy?

Accepted Answer

Systematics is the study of evolutionary relationships, while taxonomy is the classification of organisms.

Question 8

Which of the following is NOT a requirement for a population to be in Hardy-Weinberg equilibrium?

Accepted Answer

Small population size

Question 9

Which of the following statements about viruses is correct?

Accepted Answer

Viruses are non-cellular entities that require a host cell to replicate.

Question 10

Which of the following best explains why sickle-cell allele frequencies are higher in certain human populations?

Accepted Answer

The sickle-cell allele provides resistance to malaria in heterozygotes.

Question 11

Which of the following is a real-world example of a keystone predator affecting ecosystem structure?

Accepted Answer

Sea otters controlling sea urchin populations, which in turn allows kelp forests to thrive.

Question 12

Which of the following is the correct sequence for the major events in the history of life on Earth?

Accepted Answer

Origin of prokaryotes → origin of eukaryotes → colonization of land by plants → evolution of seed plants

Question 13

Which of the following best describes the endosymbiotic theory for the origin of eukaryotic cells?

Accepted Answer

Eukaryotic cells evolved from prokaryotes by engulfing other prokaryotic cells that became organelles.

Question 14

Which of the following is a defining feature of fungi?

Accepted Answer

They obtain nutrients by absorption.

Question 15

Which of the following best explains why genetic drift has a greater effect on small populations?

Accepted Answer

Random changes in allele frequencies are more likely to significantly alter the gene pool in small populations.

Question 16

Which of the following is an example of allopatric speciation?

Accepted Answer

A population of squirrels is separated by the formation of a canyon, leading to the evolution of two distinct species.

Question 17

Which of the following best describes a trophic cascade?

Accepted Answer

A process in which changes at the top of the food web affect multiple lower trophic levels.

Question 18

Which of the following is a correct statement about the colonization of land by plants?

Accepted Answer

The evolution of vascular tissue allowed plants to grow taller and transport water efficiently.

Question 19

Which of the following is a real-world example of how humans have altered natural ecosystems?

Accepted Answer

Introduction of invasive species leading to the decline of native species.

General Biology II (BIO196) – Course Syllabus and Study Guide

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