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Sponges Cnidarians Ctenophores Flatworms
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1
Question
What characterizes the body plan of Phylum Porifera?
Answer
Asconoid Syconoid Leuconoid
2
Question
What materials compose the skeleton in Phylum Porifera?
Answer
Spicules of CaCO3 or silica, or spongin fibers
3
Question
How do sponges in Phylum Porifera feed?
Answer
Filter feeding using choanocytes
4
Question
What types of reproduction occur in Phylum Porifera?
Answer
Asexual via budding or fragmentation, sexual and monoecious
5
Question
Name the three classes of Phylum Porifera.
Answer
Calcarea, Hexactinellida, Demospongiae
6
Question
How does the syconoid body form differ from asconoid in sponges?
Answer
Folded body wall with radial canals lined by choanocytes
7
Question
Why is the leuconoid body form advantageous for sponges?
Answer
Network of chambers allows larger size and efficient filter-feeding
8
Question
What material makes spicules in Class Calcarea?
Answer
Calcium carbonate
9
Question
What spicule shapes are found in Class Calcarea?
Answer
Needle-shaped, three-rayed, or four-rayed
10
Question
Which body forms do Class Calcarea sponges exhibit?
Answer
Asconoid, syconoid, and leuconoid
11
Question
Where do Class Calcarea sponges typically live?
Answer
Marine, shallow coastal waters
12
Question
What unique feature characterizes spicules in Class Hexactinellida?
Answer
Six-rayed silica spicules forming lattice-like network
13
Question
What body forms are present in Class Hexactinellida?
Answer
Syconoid or leuconoid
14
Question
What is distinctive about the cellular structure in Class Hexactinellida?
Answer
Most cells fused into multinucleated syncytium
15
Question
How do Class Hexactinellida sponges transmit signals?
Answer
Rapid electrical impulses across body
16
Question
What habitats do Class Hexactinellida occupy?
Answer
Deep marine waters
17
Question
What skeletal elements are in Class Demospongiae?
Answer
Siliceous spicules (not six-rayed), spongin, or none
18
Question
What body form do all Class Demospongiae have?
Answer
Leuconoid
19
Question
What unique habitat feature distinguishes Class Demospongiae?
Answer
Includes freshwater species, mostly marine
20
Question
What familiar product comes from Class Demospongiae?
Answer
Bath sponges
21
Question
What defines the body plan of Phylum Cnidaria?
Answer
Diploblastic, radial symmetry, gastrovascular cavity
22
Question
What provides skeletal support in Phylum Cnidaria?
Answer
Hydrostatic skeleton, some CaCO3 in corals
23
Question
How do cnidarians capture prey?
Answer
Tentacles with cnidocytes containing nematocysts
24
Question
What reproductive pattern is typical in Phylum Cnidaria?
Answer
Alternation between polyp and medusa stages
25
Question
Name the four classes of Phylum Cnidaria.
Answer
Hydrozoa, Scyphozoa, Cubozoa, Anthozoa
26
Question
What stages are in the life cycle of most Class Hydrozoa?
Answer
Sessile polyp and free-swimming medusa
27
Question
What defines Class Scyphozoa as 'true jellies'?
Answer
Large, prominent free-swimming medusa stage
28
Question
What body wall structure do Scyphozoa have?
Answer
Diploblastic with radial symmetry
29
Question
What potent features characterize Class Cubozoa?
Answer
Four corner tentacles, complex eyes, fatal venom
30
Question
What groups are included in Class Anthozoa?
Answer
Corals, anemones, sea pens, seafans