Question 1

Which of the following is NOT one of the five key characteristics that make animals efficient consumers?

Accepted Answer

Presence of cell walls for structural support

Question 2

The Cambrian explosion is significant in animal evolution because it:

Accepted Answer

Led to a rapid increase in animal diversity and complexity

Question 3

Which of the following best describes the developmental difference between protostomes and deuterostomes?

Accepted Answer

In protostomes, the mouth develops from the first embryonic opening; in deuterostomes, the anus develops first.

Question 4

Which invertebrate group is characterized by molting their exoskeleton to grow and includes arthropods?

Accepted Answer

Ecdysozoa

Question 5

A marine biologist discovers an animal with radial symmetry as an adult, a water vascular system, and an endoskeleton of calcareous plates. To which group does this animal most likely belong?

Accepted Answer

Echinodermata

Question 6

Which of the following is a derived trait unique to birds among reptiles?

Accepted Answer

Feathers

Question 7

Which of the following is NOT a characteristic shared by all chordates?

Accepted Answer

Chitinous exoskeleton

Question 8

Which vertebrate group is considered a transitional taxon between fish and amniotic organisms, and why?

Accepted Answer

Amphibians, because they have both aquatic and terrestrial adaptations

Question 9

Which of the following best explains why the amniotic egg was a key evolutionary innovation for tetrapods?

Accepted Answer

It allowed reproduction away from water by providing protective membranes, a shell, and self-contained nutrients.

Question 10

Which of the following is a correct pairing of a vertebrate group and a key trait?

Accepted Answer

Chondrichthyes – cartilaginous skeleton

Question 11

A researcher observes a sequence of unchangeable behaviors in a goose that always completes once started, triggered by the sight of an egg outside its nest. This is an example of:

Accepted Answer

Fixed action pattern

Question 12

In Tinbergen’s four questions, which question is being addressed when a scientist asks, 'What evolutionary advantage does a bird’s migratory behavior provide?'

Accepted Answer

Function (ultimate causation)

Question 13

Which of the following best illustrates kin selection?

Accepted Answer

A worker bee sacrifices itself to protect the hive, increasing the survival of its sisters.

Question 14

Which mating system is most likely to maximize genetic diversity but involves little to no parental care?

Accepted Answer

Promiscuity

Question 15

Which of the following is an example of a learned behavior?

Accepted Answer

A young chimpanzee learning to crack nuts by watching its mother

Question 16

Which of the following is a unique derived characteristic of mammals?

Accepted Answer

Three middle ear bones

Question 17

Which of the following best describes the evolutionary lineage of modern humans?

Accepted Answer

Modern humans evolved in Africa about 200,000–300,000 years ago and are most closely related to chimpanzees and bonobos.

Question 18

Which of the following best describes the difference between Lophotrochozoa and Ecdysozoa?

Accepted Answer

Ecdysozoa grow by molting their exoskeleton, while Lophotrochozoa do not.

Question 19

Which of the following is a correct match between an arthropod subgroup and its distinguishing feature?

Accepted Answer

Chelicerates – first pair of appendages are fangs or pincers

Question 20

A male painted bunting in Texas arrives in early April, defends a territory, sings, and performs visual displays to attract a mate. Which of the following best describes the types of behaviors involved?

Accepted Answer

Migration, territoriality, courtship, and communication

Animal Diversity and Behavior: Study Guide

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