Question 1

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

Accepted Answer

Asexual reproduction

Question 2

Animals are classified as eukaryotes. Which of the following is a defining feature of eukaryotic cells?

Accepted Answer

Membrane-bound organelles

Question 3

Which clade includes all animals with true tissues?

Accepted Answer

Eumetazoa

Question 4

Which phylum is considered basal in the animal phylogenetic tree and lacks true tissues?

Accepted Answer

Porifera

Question 5

Which of the following statements about Cnidarians is correct?

Accepted Answer

They are diploblasts with radial symmetry.

Question 6

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

Accepted Answer

Cephalopoda

Question 7

A scientist discovers a marine animal with eight dorsal plates and a radula for scraping algae. To which class does this animal most likely belong?

Accepted Answer

Polyplacophora

Question 8

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

Accepted Answer

Jointed appendages

Question 9

Which process allows ecdysozoans to grow by shedding their old exoskeleton?

Accepted Answer

Ecdysis

Question 10

A patient contracts trichinosis after eating undercooked pork. Which phylum does the causative organism belong to?

Accepted Answer

Nematoda

Question 11

Which of the following is true about the water vascular system in echinoderms?

Accepted Answer

It is a network of hydraulic canals used for locomotion and feeding.

Question 12

Which developmental feature distinguishes protostomes from deuterostomes?

Accepted Answer

Mouth develops from the blastopore in protostomes

Question 13

Which of the following is a real-world example of evolutionary adaptation in molluscs?

Accepted Answer

Increase in shell thickness of periwinkle snails due to crab predation

Question 14

Which class of annelids includes earthworms and leeches?

Accepted Answer

Sedentarians

Question 15

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

Accepted Answer

Arthropoda - jointed appendages

Question 16

Which of the following statements about insect metamorphosis is correct?

Accepted Answer

In incomplete metamorphosis, nymphs resemble adults but are smaller.

Question 17

Which of the following is a feature of nematodes?

Accepted Answer

Alimentary canal with two openings

Question 18

Which phylum includes animals with a U-shaped alimentary canal and true coelom, most of which are sessile?

Accepted Answer

Brachiopoda

Question 19

Which of the following is a function of the mantle in molluscs?

Accepted Answer

Protection and sometimes formation of a cavity

Question 20

Which of the following is a correct statement about the symmetry of echinoderm larvae and adults?

Accepted Answer

Larvae have bilateral symmetry, adults have radial symmetry.

Animal Diversity and Invertebrate Phyla: Study Guide (Ch. 32 & 33)

Study Guide - Practice Questions