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Biology Laboratory Manual, 6/e

Darrell S. Vodopich, Baylor University
Randy Moore, University of Minnesota--Minneapolis

Exercise 39 - Survey of Animals

Choose the one answer that best answers the question.


1	Which of the following is a characteristic of deuterostomes?
		A)	The blastopore becomes the anus.
		B)	The pattern of early cell division is in the form of a spiral.
		C)	The pattern of early cell division is radial.
		D)	The fate of the cells of the early embryo is fixed at an early stage.


2	Starfish, sea urchins, and sand dollars are members of Phylum _____.
		A)	Arthropoda
		B)	Echinodermata
		C)	Hemichordata
		D)	Chordata


3	The echinoderm skeleton is made of calcareous plates called ____.
		A)	carapaces
		B)	madreporites
		C)	ossicles
		D)	tests


4	The echinoderm water vascular system is used for ____.
		A)	respiration
		B)	excretion
		C)	locomotion
		D)	blood circulation


5	What is the major structural difference between ancient and modern crinoids?
		A)	In ancient crinoids, the oral surface faced upward unlike modern crinoids.
		B)	In ancient crinoids, the oral surface faced downward unlike modern crinoids.
		C)	In most modern crinoids, highly branched arms are found surrounding the mouth and anus, but ancient crinoids only had arms around the anus.
		D)	Most ancient crinoids attached to the substrate with a stalk. Most modern species are not stalked or permanently attached.


6	Which of the following structures do hemichordates and chordates not have in common?
		A)	dorsal nerve cord
		B)	pharyngeal gill slits
		C)	anus
		D)	notochord


7	In urochordates, the pharyngeal basket is used for _____.
		A)	filtering food
		B)	digestion
		C)	blood circulation
		D)	reproduction


8	The most common genus of cephalochordates is ____.
		A)	amphioxus
		B)	Nereis
		C)	Lumbriculus
		D)	Branchiostoma


9	In bony fishes, balance and buoyancy are regulated by _____.
		A)	endoskeleton
		B)	water vascular system
		C)	opercula
		D)	air bladders


10	A four chambered heart and a homeothermic body temperature are found in members of Class ____.
		A)	Amphibia
		B)	Mammalia
		C)	Reptilia
		D)	Chondrichthyes

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