Question 1

Which of the following best describes a homologous structure?

Accepted Answer

A structure that is similar in different species because of shared ancestry, even if it serves different functions.

Question 2

Darwin listed several vestigial features in the human body. Which of the following is an example of a vestigial structure?

Accepted Answer

The human appendix

Question 3

Which of the following statements about convergent evolution is correct?

Accepted Answer

It results in similar features in unrelated species due to similar environmental pressures.

Question 4

Which of the following is an example of parallel evolution?

Accepted Answer

The independent evolution of similar traits in marsupial and placental mammals.

Question 5

Which equation best represents the principle of maximum parsimony in phylogenetic analysis?

Accepted Answer

$$S = \min \sum_{i=1}^{n} c_i$$

Question 6

Which of the following best explains why wings of bats and birds are considered analogous rather than homologous?

Accepted Answer

They evolved independently in each lineage for the purpose of flight.

Question 7

A scientist is comparing the DNA sequences of two species to determine their evolutionary relationship. Which method is she most likely using?

Accepted Answer

Phylogenetic analysis

Question 8

Which of the following is a real-world example of convergent evolution?

Accepted Answer

The evolution of resistance to cardiac glycosides in both monarch butterflies and certain birds.

Question 9

Which of the following statements about vestigial structures is correct?

Accepted Answer

They are features that have lost their original function through evolution.

Question 10

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

Accepted Answer

Homology refers to similarity due to shared ancestry, while analogy refers to similarity due to convergent evolution.

Question 11

Which of the following is an example of a derived (apomorphic) character in mammals?

Accepted Answer

Hair

Question 12

Which of the following best explains why frogs are considered more ancestral compared to other land-living tetrapods?

Accepted Answer

They retain more ancestral features such as five toes on the hind foot and multiple bones in the lower jaw.

Question 13

Which of the following is a correct statement about the sodium-potassium pump in insects that feed on plants with cardiac glycosides (CGs)?

Accepted Answer

Some insects have evolved resistance to CGs by altering the sodium-potassium pump protein.

Question 14

Which of the following best describes the process of gradualism in evolution?

Accepted Answer

Evolution occurs by small successive changes over long periods of time.

Question 15

Which of the following is a synapomorphy for mammals?

Accepted Answer

Mammary glands

Question 16

Which of the following best explains why phylogenetic trees are considered hypotheses?

Accepted Answer

They represent the best current understanding of evolutionary relationships, which may change with new data.

Question 17

Which of the following is an example of a monophyletic group?

Accepted Answer

All descendants of a single common ancestor, including that ancestor.

Question 18

Which of the following best describes the difference between a synapomorphy and a plesiomorphy?

Accepted Answer

A synapomorphy is a shared derived character, while a plesiomorphy is an ancestral character.

Question 19

Which of the following is a real-world example of a polyphyletic group?

Accepted Answer

Grouping flying animals such as bats, birds, and insects together based solely on their ability to fly.

Question 20

Which of the following best explains why phylogenetic analysis is important in modern biology?

Accepted Answer

It helps scientists understand evolutionary relationships and trace the origins of traits.

Homology, Analogy, and Phylogenetic Systematics in Evolutionary Biology

Study Guide - Practice Questions