Question 1

Which of the following is NOT a key feature shared by all chordates at some point in their development?

Accepted Answer

A ventral heart

Question 2

In vertebrates, what structure replaces the notochord during development?

Accepted Answer

The vertebral column

Question 3

Which group of chordates is characterized by being sessile as adults but having all four chordate features as larvae?

Accepted Answer

Tunicates

Question 4

Which adaptation allowed vertebrates to exploit a wider range of food sources compared to jawless fish?

Accepted Answer

Evolution of jaws

Question 5

A biologist discovers a small, fishlike animal that retains all four chordate features as an adult and reproduces sexually by releasing gametes into the water. This animal is most likely a:

Accepted Answer

Lancelet

Question 6

Which of the following is a unique characteristic of mammals compared to other vertebrates?

Accepted Answer

Production of milk by mammary glands

Question 7

Which vertebrate group is characterized by having both gills and lungs, and can survive periods of drought by burrowing into mud?

Accepted Answer

Lungfishes

Question 8

Birds and mammals are both endothermic. Which adaptation do birds possess that helps them maintain a high metabolic rate required for flight?

Accepted Answer

Air sacs that provide continuous oxygen flow

Question 9

Which of the following statements about amphibian reproduction is TRUE?

Accepted Answer

Fertilization is generally external and requires water

Question 10

A scientist is studying an animal with a boxlike shell fused to its vertebrae, no teeth, and a horny beak. This animal is most likely a:

Accepted Answer

Turtle

Question 11

Which of the following is a function of the vertebrate vertebral column?

Accepted Answer

It provides attachment sites for muscles

Question 12

Which group of mammals is unique in that it lays eggs rather than giving birth to live young?

Accepted Answer

Monotremes

Question 13

Which adaptation is found in reptiles but NOT in amphibians, allowing reptiles to reproduce successfully on land?

Accepted Answer

Shelled amniotic eggs

Question 14

Which of the following best explains why ray-finned fishes are so diverse and widespread?

Accepted Answer

Their fins are supported by bony spines and they possess a swim bladder

Question 15

Which vertebrate group is the only one to have evolved powered flight and echolocation in some of its members?

Accepted Answer

Bats (placental mammals)

Question 16

A researcher finds an animal with a three-chambered heart, moist skin used for respiration, and a life cycle that includes metamorphosis from an aquatic larva to a terrestrial adult. This animal is most likely a(n):

Accepted Answer

Amphibian

Question 17

Which of the following is a characteristic of all craniates but NOT all chordates?

Accepted Answer

A skull enclosing the brain

Question 18

Which of the following is a major evolutionary advantage of the amniotic egg?

Accepted Answer

It prevents the embryo from drying out on land

Question 19

Which of the following statements about lampreys is TRUE?

Accepted Answer

Some species are parasitic and use a sucker-like mouth to feed on other fish

Question 20

Which of the following best describes the evolutionary significance of lobed fins in coelacanths and lungfishes?

Accepted Answer

They are precursors to the limbs of tetrapods

Animal Diversity II: Vertebrates – Structure, Evolution, and Major Groups

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