$$\text{Oxygenation efficiency} \propto \text{Number of heart chambers}$$

Question 1

Which class of fish is represented by the animal being held in the image, and what is a unique characteristic of this class?

Accepted Answer

Agnatha; they lack jaws and scales.

Question 2

Which of the following is NOT a characteristic of all animals?

Accepted Answer

Autotrophic

Question 3

Which structure in chordates develops into the brain and spinal cord?

Accepted Answer

Dorsal, hollow nerve cord

Question 4

What adaptation allows reptiles to reproduce successfully on land?

Accepted Answer

Amniote eggs with waterproof shells

Question 5

Which of the following best explains why amphibians are described as having a 'double life'?

Accepted Answer

They live mostly on land but require water for reproduction.

Question 6

Which heart structure is found in both amphibians and most reptiles?

Accepted Answer

Three-chambered heart

Question 7

Birds are able to fly efficiently due to several adaptations. Which of the following is NOT one of these adaptations?

Accepted Answer

Swim bladder

Question 8

Which of the following is a characteristic unique to mammals?

Accepted Answer

Hair or fur

Question 9

Which group of mammals lays eggs?

Accepted Answer

Monotremes

Question 10

A fish is observed to have a skeleton made of cartilage, paired fins, and scales. To which class does it most likely belong?

Accepted Answer

Chondrichthyes

Question 11

Which of the following best describes the function of the operculum in bony fish?

Accepted Answer

It covers the gills and pumps water over them.

Question 12

Which of the following is a correct comparison between fish and mammals regarding reproduction and parental care?

Accepted Answer

Fish produce many offspring with little parental care; mammals produce few offspring with much parental care.

Question 13

Which of the following is NOT a chordate characteristic?

Accepted Answer

Exoskeleton

Question 14

Which adaptation is shared by both alligators and crocodiles but not by most other reptiles?

Accepted Answer

Four-chambered heart

Question 15

Which of the following equations best represents the relationship between heart chambers and oxygenation in vertebrates?

Accepted Answer

$$	ext{Oxygenation efficiency} \propto 	ext{Number of heart chambers}$$

Question 16

Which of the following is a real-world example of an animal with a highly toxic defense mechanism?

Accepted Answer

Golden poison frog

Question 17

Which of the following best describes the evolutionary advantage of the amniote egg in reptiles?

Accepted Answer

It prevents desiccation of the embryo on land.

Question 18

Which of the following is a defining feature of marsupials?

Accepted Answer

Young complete development in a pouch

Question 19

Which of the following best explains why birds are considered endothermic?

Accepted Answer

They metabolically maintain a constant internal temperature.

Question 20

Which of the following is a correct pairing of animal group and heart structure?

Accepted Answer

Birds – four-chambered heart

Animal Diversity: Major Vertebrate Groups and Their Characteristics

Study Guide - Practice Questions