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Pre-Test
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1
Which of the following is not a characteristic of Parazoa?
A)It only consists of one phyla;porifera
B)Organisms lack true tissues
C)Organisms are loosely organized
D)Most organisms do not display apparent symmetry
E)All of the above are characteristics of Parazoa
2
Which of the following have a gastrovascular cavity as their internal body cavity?
A)Cnidarians
B)Porifera
C)ctenophores
D)2 and 3
E)1 and 2
3
Which one of the following would not be a member of the group Lophotrochozoa?
A)Segmented worms
B)Sea urchins
C)Mollusks
D)Rotifers
E)Flatworms
4
True or False: Molluscs have an open circulatory system that circulates hemolymph between its organs.
A)True
B)False
5
True or False: Echinoderms are invertebrate animals but share a clade with vertebrates called Deuterostomia.
A)True
B)False





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