Question 1

Which of the following is NOT a characteristic common to most animals?

Accepted Answer

Asexual reproduction

Question 2

Which domain do animals belong to?

Accepted Answer

Eukaryota

Question 3

Which of the following best describes the feeding strategy of Porifera (sponges)?

Accepted Answer

Filter feeders (suspension feeders)

Question 4

Cnidarians are unique among animals because they possess:

Accepted Answer

Cnidocytes containing nematocysts

Question 5

Which of the following statements about animal phylogeny is correct?

Accepted Answer

All animals form a clade called Metazoa

Question 6

Which of the following is a defining feature of the phylum Platyhelminthes (flatworms)?

Accepted Answer

Triploblastic, acoelomate body plan

Question 7

Which of the following is a unique adaptation of molluscs?

Accepted Answer

A mantle that may secrete a shell

Question 8

Which class of molluscs is characterized by a closed circulatory system and a highly developed nervous system?

Accepted Answer

Cephalopoda

Question 9

What is the main function of the water vascular system in echinoderms?

Accepted Answer

Locomotion and feeding

Question 10

Which of the following best describes the evolutionary significance of the Cambrian explosion for animal diversity?

Accepted Answer

It marks the rapid diversification of animal body plans and the appearance of most major animal phyla.

Question 11

Which of the following is a feature of arthropods that contributed to their evolutionary success?

Accepted Answer

Jointed appendages and an exoskeleton

Question 12

Which of the following is true about the development of protostomes?

Accepted Answer

The blastopore becomes the mouth

Question 13

Which group of animals is characterized by the presence of a lophophore?

Accepted Answer

Brachiopods

Question 14

Which of the following is a correct match between a taxon and a body structure?

Accepted Answer

Echinodermata: water vascular system

Question 15

Which of the following is a real-world example of a parasitic flatworm affecting humans?

Accepted Answer

Schistosoma (a fluke) living in human blood vessels

Question 16

Which of the following statements about insect metamorphosis is correct?

Accepted Answer

Complete metamorphosis involves a larval stage that looks entirely different from the adult

Question 17

Which of the following is a unique feature of nematodes?

Accepted Answer

A pseudocoelom and no circulatory system

Question 18

Which of the following adaptations is found in leeches that allows them to feed on blood?

Accepted Answer

Secretion of hirudin to prevent blood coagulation

Question 19

Which of the following is a correct statement about the symmetry of echinoderms?

Accepted Answer

Larvae are bilaterally symmetric, adults are radially symmetric

Question 20

Which of the following is a real-world consequence of the evolutionary adaptation of the exoskeleton in arthropods?

Accepted Answer

It provides protection and support, but requires molting for growth (ecdysis)

Animal Diversity and Invertebrate Phyla (Ch. 32 & 33) – Study Notes

Study Guide - Practice Questions