Question 1

Which of the following domains includes all animals?

Accepted Answer

Eukaryota

Question 2

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

Accepted Answer

Asexual reproduction

Question 3

Animals are classified as heterotrophs because they:

Accepted Answer

Ingest and digest other organisms for nutrients

Question 4

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

Accepted Answer

Porifera

Question 5

Which of the following statements about the phylogenetic tree of Animalia is correct?

Accepted Answer

All animals are part of the clade Metazoa

Question 6

Which feature distinguishes Eumetazoa from Porifera?

Accepted Answer

True tissues

Question 7

Cnidarians are characterized by which of the following features?

Accepted Answer

Radial symmetry and diploblastic tissues

Question 8

Which class of molluscs is known for having a closed circulatory system and a complex brain?

Accepted Answer

Cephalopoda

Question 9

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

Accepted Answer

Increase in shell thickness in periwinkles due to crab predation

Question 10

Which phylum includes animals that are filter feeders, lack true tissues, and are hermaphroditic?

Accepted Answer

Porifera

Question 11

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

Accepted Answer

Triploblastic and acoelomate body plan

Question 12

Rotifers (Phylum Syndermata) are unique among Lophotrochozoans because they:

Accepted Answer

Possess an alimentary canal with two openings and can reproduce by parthenogenesis

Question 13

Which class of molluscs uses a radula to scrape algae off rocks and has a shell of eight dorsal plates?

Accepted Answer

Polyplacophora (Chitons)

Question 14

Which of the following is a defining feature of annelids?

Accepted Answer

Segmented body and closed circulatory system

Question 15

Which process allows ecdysozoans to grow by shedding their exoskeleton?

Accepted Answer

Ecdysis

Question 16

Which of the following is true about arthropods?

Accepted Answer

They possess jointed appendages and an exoskeleton

Question 17

Which subphylum of arthropods includes animals with book lungs and chelicerae?

Accepted Answer

Chelicerata

Question 18

Which class of echinoderms is capable of regenerating lost arms and feeds on bivalves?

Accepted Answer

Asteroidea (sea stars)

Question 19

Which of the following equations correctly represents the number of legs in a decapod crustacean?

Accepted Answer

$$10 = 2 	imes 5$$

Question 20

During embryonic development, which process involves a succession of cell divisions without cell growth?

Accepted Answer

Cleavage

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

Study Guide - Practice Questions