Review the image(s) and answer the following questions.

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1		This phylogenetic diagram based on rRNA analyses indicates that the root of all three domains occurred within what domain?
			A)	eubacteria
			B)	archaea
			C)	eukarya
			D)	None of these is correct.
2		Based on this phylogeny, what two domains are more closely related to one another?
			A)	eubacteria and archaea
			B)	archaea and eukarya
			C)	eubacteria and eukarya
			D)	All three appear to be distant relatives; there is no way to tell which pair is more closely related.

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3		What are prions?
			A)	tiny viruses
			B)	like a retrovirus, except containing rRNA
			C)	a proteinaceaous infectious particle
			D)	similar to viroids
4		There is some argument as to whether prions actually exist and whether they can cause illness. What disease(s) is associated with prions?
			A)	bovine spongiform encephalopathy ("mad cow" disease)
			B)	Creutzfeldt-Jacob disease (CJD)
			C)	kuru
			D)	All of these are correct.

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5		Primitive amphibians arose from what group?
			A)	reptiles
			B)	fish
			C)	mammals
			D)	birds
6		What group arose from the amphibians and later gave rise to dinosaurs, mammals, and birds?
			A)	bony fishes
			B)	placoderms
			C)	reptiles
			D)	jawless fishes