Q. No.Parazoa is a taxon at the base of the phylogenetic tree of the animal kingdom and includes the most primitive forms, characterized by not having proper tissues. The phylum/phyla included in this taxon will be:
I. Porifera
II. Cnidaria
III. Ctenophora
1.
Only I
2.
Only II and III
3.
Only I and II
4.
I, II and III
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In metamerism, there is serial repetition of unit subdivisions of:
I. Ectoderm products
II. Mesoderm products
III. Endoderm products
| 1. | Only II | 2. | Only I and II |
| 3. | Only II and III | 4. | I, II and III |
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What do you see in the given picture?
| 1. | Tube sponges |
| 2. | Cnidarian polyps connected by calcium carbonate |
| 3. | Echinoderm anthozoans |
| 4. | Comb jellies |
The structure marked ‘X’ in the given diagram is:
| 1. | used in generating water current in sponges |
| 2. | a cell used for capturing prey in Cnidarians |
| 3. | a sticky cell used for anchorage in comb jellies |
| 4. | an excretory and osmoregulatory cell in flatworms |
Identify the correct statements regarding the members of Phylum Aschelminthes:
I. Their body is circular in cross-section
II. Alimentary canal is complete
III. Males, are often, longer than females
| 1. | Only II | 2. | Only I and II |
| 3. | Only II and III | 4. | Only III |
In a typical mollusc:
| I: | Head, muscular foot and visceral hump are body segments. |
| II: | Mantle over the visceral hump is formed by a layer of skin. |
| III: | Radula is a file-like rasping organ |
1. Only III is correct
2. Only II and III are correct
3. Only I and III are correct
4. Only I and II are correct
The larvae in echinoderms are:
| I. Radially symmetrical | II. Free swimming |
| 1. | Only I | 2. | Only II |
| 3. | Both I and II | 4. | Neither I nor II |
The diagram below shows the body plan of a:
| 1. | Cephalochordate | 2. | Cyclostome |
| 3. | Cartilaginous fish | 4. | Bony fish |
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The lungs shown in the given diagram belong to the respiratory system of:
| 1. | Amphibians | 2. | Reptiles |
| 3. | Birds | 4. | Mammals |
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