Question 1

Which Ecdysozoan phylum contains three-quarters of the known animal species?

Accepted Answer

A) Nemertea 
B) Annelida 
C) Arthropoda 
D) Nematoda

Question 2

Which of the following lineages of Cnidarians have both polyp and medusa stages in their life cycles-with the polyp stage typically forming a colony-and includes species of Obelia?

Accepted Answer

A) Anthozoa 
B) Trematoda 
C) Hydrozoa 
D) Cubozoa

Question 3

Which Lophotrochozoan phylum includes members that have a wheel-like, ciliated, food-gathering organ around their heads called a corona?

Accepted Answer

A) Mollusca 
B) Rotifera 
C) Nemertea 
D) Platyhelminthes

Question 4

What term refers to specialized cells that serve as a simple excretory system in flatworms?

Accepted Answer

A) choanocytes 
B) cnidocytes 
C) tentacles 
D) flame cells

Question 5

Members of the order Hemiptera (true bugs) go through postembryonic development called incomplete metamorphosis. What are the stages of this process?

Accepted Answer

A) several instars of often wormlike larvae, followed by a stage where they are a sessile pupa, and then ending in an adult stage that is very different from the larval stages 
B) a series of nymph instars that lack functional wings, ending with an adult instar with functional wings 
C) a single, wingless nymph instar followed by several winged adult instars 
D) a series of young instars that become more and more like an adult, ending with a wingless adult instar

Question 6

In bristle worms, what is the name of paired, fleshy extensions of the body wall that are used for locomotion and gas exchange?

Accepted Answer

A) setae 
B) parapodia 
C) septa 
D) metanephridia

Question 7

Which Lophotrochozoan phylum includes earthworms, bristle worms, and leeches?

Accepted Answer

A) Platyhelminthes 
B) Nemertea 
C) Rotifera 
D) Annelida

Question 8

Which Ecdysozoan phylum contains members that have a segmented body encased in a rigid exoskeleton made of chitin plus other materials?

Accepted Answer

A) Annelida 
B) Nemertea 
C) Nematoda 
D) Arthropoda

Exam 27: Diversity of Animals 1: Sponges, Radiata, Platyhelminthes, and Protostomes