Question 1

Which of the following is a defining characteristic of deuterostomes, as opposed to protostomes?

Accepted Answer

The anus develops from the blastopore.

Question 2

Echinoderms exhibit a unique symmetry in their adult form. Which statement best describes this symmetry?

Accepted Answer

Secondary radial symmetry in adults, with bilateral symmetry in larvae.

Question 3

Which class of echinoderms is characterized by five arms, tube feet, and an eversible stomach used for feeding?

Accepted Answer

Asteroidea

Question 4

A sea star feeds on a mussel by everting its stomach. Which physiological system is primarily involved in this process?

Accepted Answer

Digestive system

Question 5

Which echinoderm class is most likely to be found attached to a substrate via a stalk and uses feathery arms for filter feeding?

Accepted Answer

Crinoidea

Question 6

Chordates are defined by four key features. Which of the following is NOT one of these features?

Accepted Answer

Ventral solid nerve cord

Question 7

Which subphylum of chordates includes marine filter feeders that are usually sessile but can swim, and perform gas exchange across their body surface?

Accepted Answer

Cephalochordata

Question 8

Which vertebrate clade is characterized by jawless fishes with no appendages, such as lampreys and hagfish?

Accepted Answer

Cyclostomata

Question 9

A lamprey is found attached to a fish, feeding on its blood. Which feature distinguishes lampreys from hagfish?

Accepted Answer

Lampreys are parasitic as adults, while hagfish are not.

Question 10

Which vertebrate class is characterized by a cartilaginous skeleton, teeth not fused to the jaw, no swim bladder, and internal fertilization?

Accepted Answer

Chondrichthyes

Question 11

Ray-finned fishes (Actinopterygii) possess a swim bladder. What is the primary function of the swim bladder?

Accepted Answer

Regulation of buoyancy

Question 12

Which vertebrate clade includes animals with bony extensions and muscles projecting into pectoral and pelvic fins, such as coelacanths and lungfishes?

Accepted Answer

Sarcopterygii

Question 13

Amphibians require freshwater for reproduction. Which adaptation allows adult amphibians to live on land?

Accepted Answer

Development of lungs and double blood circulation

Question 14

Birds (Aves) are distinguished from other vertebrates by which combination of features?

Accepted Answer

Feathers, hollow bones, air sacs, and four-chambered heart

Question 15

Which vertebrate clade is characterized by mammary glands, hair, specialized teeth, and highly developed brains?

Accepted Answer

Mammalia

Question 16

Which of the following best explains the evolutionary significance of Hox gene clusters in vertebrates?

Accepted Answer

Multiple Hox gene clusters permit increasingly complex morphologies.

Question 17

A researcher finds an animal with a five-part body plan, tube feet, and no excretory organs. Which phylum does this animal most likely belong to?

Accepted Answer

Echinodermata

Question 18

Which vertebrate clade is characterized by a body encased in a hard shell, no teeth, and eggs laid on land?

Accepted Answer

Testudines

Question 19

Which of the following is a real-world example of autotomy in echinoderms?

Accepted Answer

A sea star intentionally detaches an arm to escape a predator and later regenerates it.

Animal Diversity: Invertebrates and Vertebrates (Echinoderms & Chordates)

Study Guide - Practice Questions

Study Guide - Flashcards