Choose the best answer

1			The traditional animal family tree places more significance on body plan (the presence of a coelom) while the rRNA tree places more significance on Need a Hint?
			A)	embryological development patterns.
			B)	whether or not the animal molts.
			C)	symmetry.
			D)	all of these.
2			A key evolutionary development seen for the first time in the sponges is Need a Hint?
			A)	a complete digestive system.
			B)	tissues.
			C)	body symmetry.
			D)	multicellularity.
3			All of the following are found in sponges except Need a Hint?
			A)	spicules.
			B)	choanocytes.
			C)	a digestive tract.
			D)	sexual and/or asexual reproduction.
4			The first animal group to show extracellular digestion was the Need a Hint?
			A)	sponges
			B)	cnidarians.
			C)	flatworms.
			D)	roundworms.
5			Cnidarians project a nematocyst to capture their prey by Need a Hint?
			A)	building up a high internal osmotic pressure.
			B)	ejecting it with a jet of water.
			C)	using a springlike apparatus.
			D)	muscle contractions that "throw" the nematocyst.
6			Which of the following is an example of an organism with the medusa body form? Need a Hint?
			A)	a hydra
			B)	a coral
			C)	an anemone
			D)	a jellyfish
7			Key evolutionary advances of the flatworms are bilateral symmetry and Need a Hint?
			A)	a coelom.
			B)	internal organs.
			C)	a one-way digestive tract.
			D)	a body cavity.
8			For excretion, flatworms use Need a Hint?
			A)	miracidium.
			B)	osmosis.
			C)	flame cells.
			D)	proglottids.
9			The type of body cavity seen in the roundworms is called a(n) Need a Hint?
			A)	coelom.
			B)	acoelom.
			C)	pseudocoelom.
			D)	gastrovascular cavity.
10			The type of pseudocoelomates found in soil, freshwater and marine environments, and as parasites are Need a Hint?
			A)	nematodes.
			B)	Trichinella.
			C)	rotifers.
			D)	Cycliophora.