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Cniderians Quiz
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1

What does the Greek term “cnidaria” mean? Coelenterata?
2

What are the defining characteristics of the Phylum Cnidaria?
3

What type of symmetry do cnidarians exhibit?
4

Are cnidarians diploblastic or triploblastic?
5

What is mesoglea? function?
6

What are “cnidae”?
7

What are the types/functions of cnidae? Which type is the most widespread?
8

What are the disadvantages of not having an anus? (Disadvantages of having a gastrovascular cavity or coelenteron with only one opening.)
9

Describe the nervous system of cnidarians.
10

What are epitheliomuscular cells? nutritive-muscular cells? what other types of cells are present in the body wall?
11

What are the 4 classes of the Phylum Cnidaria?
12

What does the name “scyphozoa” mean? common name of class?
13

What is the defining characteristic of the Class Scyphozoa?
14

What are the functions of the jellyfish sense organs: rhopalium, ocellus, statocyst?
15

Describe the scyphozoan life cycle.
16

What does the name “cubozoa” mean? common name of class?
17

What are the defining characteristics of the Class Cubozoa?
18

How do cubozoans differ from “true jellyfish” (scyphozoans)?
19

What does the name “hydrozoa” mean? common name of class?
20

What are the defining characteristics of the Class Hydrozoa?
21

What are the 3 major orders of the Class Hydrozoa?
22

How do hydromedusae differ from scyphomedusae?
23

Explain the life cycle of Obelia.
24

What organisms are in the Order Siphonophora? Are they solitary or colonial?
25

What are hydrocorals?
26

What does the name “anthozoa” mean?
27

What are the defining characteristics of the Class Anthozoa?
28

What animals are included in the Subclass Hexacorallia?
29

What are the characteristics of the hexacorallians?
30

Distinguish between hermatypic and ahermatypic corals. What is the role of zooxanthellae in reef growth?
31

What animals are included in the Subclass Octocorallia?
32

What are the defining characteristics of the octocorals?
33

Define pinnules, axial rod, gorgonin.
34

Why are octocorals a potential source of effective anticancer agents?





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