Q. No.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:
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 |
Given below is a list of animals. What is the number of animals in the list that have a true coelom but not a segmented body?
| Meandrina, Chaetopleura, Cucumaria, Ancylostoma, Bombyx, Aplysia, Amphioxus, Antedon |
| 1. | 2 | 2. | 3 |
| 3. | 4 | 4. | 5 |
What do you see in the given picture?
| 1. | Tube sponges |
| 2. | Cnidarian polyps connected by calcium carbonate |
| 3. | Echinoderm anthozoans |
| 4. | Comb jellies |
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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