Question 1

Which of the following is NOT one of the four key features shared by all chordates at some stage of their development?

Accepted Answer

A dorsal nerve cord

Question 2

The discovery of the coelacanth in 1938 was significant because:

Accepted Answer

It was thought to have been extinct for 80 million years

Question 3

Which structure in chordates provides support for the body and serves as an attachment site for muscles?

Accepted Answer

Notochord

Question 4

In adult humans, which chordate features are only present during embryonic development?

Accepted Answer

Notochord, pharyngeal gill slits, and post-anal tail

Question 5

Which group of chordates is characterized by being sessile as adults, filter-feeding, and having a basket-like pharynx lined with mucus?

Accepted Answer

Tunicates (sea squirts)

Question 6

Which of the following statements about hagfishes is TRUE?

Accepted Answer

They secrete slime as a defense mechanism

Question 7

What evolutionary advantage did the development of jaws provide to early vertebrates?

Accepted Answer

It enabled vertebrates to exploit a wider range of food sources

Question 8

Which of the following is a distinguishing feature of ray-finned fishes (Actinopterygii)?

Accepted Answer

Fins supported by bony spines

Question 9

Why are amphibians considered to have a 'double life'?

Accepted Answer

They undergo metamorphosis from aquatic larvae to terrestrial adults

Question 10

Which adaptation allows reptiles to reproduce successfully on land?

Accepted Answer

Amniotic egg with a protective shell

Question 11

Birds are considered a subgroup of which vertebrate class?

Accepted Answer

Reptiles

Question 12

Which of the following best describes the circulatory system of birds and mammals?

Accepted Answer

Four-chambered heart with complete separation of oxygenated and deoxygenated blood

Question 13

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 14

Which of the following is a correct comparison between frogs and toads?

Accepted Answer

Frogs have smooth, moist skin and long hind limbs; toads have drier, bumpy skin and shorter hind limbs

Question 15

Which of the following is an example of a vestigial structure in snakes?

Accepted Answer

Remnants of hind limb bones

Question 16

What is the primary function of the swim bladder in ray-finned fishes?

Accepted Answer

To regulate buoyancy

Question 17

Which group of vertebrates is known for extensive parental care, including guarding nests and transporting young in their mouths?

Accepted Answer

Crocodilians

Question 18

Which of the following is a unique adaptation of birds that supports their high metabolic rate and flight?

Accepted Answer

Air sacs that provide a continuous supply of oxygenated air

Question 19

Which of the following best explains why amphibian eggs must be laid in moist environments?

Accepted Answer

Their eggs lack a waterproof covering and will dry out if not kept moist

Question 20

Which of the following is a defining characteristic of mammals?

Accepted Answer

Having hair and mammary glands

Animal Diversity II: Vertebrates – Study Notes

Study Guide - Practice Questions