Q. No.A cell isolated from a four-cell stage larva can develop into a complete animal in:
1. Snail
2. Earthworm
3. Sea urchin
4. Drosophila
1. Snail
2. Earthworm
3. Sea urchin
4. Drosophila
Triploblastic organization, bilateral symmetry but lack of coelom will be seen in:
| 1. | Planaria | 2. | Pheretima |
| 3. | Periplaneta | 4. | Pinctada |
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All the following are features of non chordates except:
1. A dorsal heart, if present
2. Ventral, solid and double central nervous system
3. Absence of gill slits
4. Post anal tail
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Identify the incorrectly matched pair:
|
Phylum |
Characteristic |
|
|
1. |
Porifera |
Water vascular system |
|
2. |
Ctenophora |
Bioluminescence |
|
3. |
Molluska |
Radula |
|
4. |
Annelida |
Closed circulatory system |
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Cyclostomes:
| 1. | are fresh water organisms that move to marine water for spawning |
| 2. | have an open circulatory system |
| 3. | have a sucking and circular mouth without jaws |
| 4. | do not have either scales on body or paired fins |
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Identify the number of animals that do not have homoiothermy from the list given in the box below:
| Aptenodytes, Hemidactylus, Pteropus, Icthyophis, Pterophyllum, Carcharodon, Neophron, Myxine |
| 1. | 3 | 2. | 4 |
| 3. | 5 | 4. | 6 |
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The animals belonging to all the following groups are exclusively marine except:
| 1. | Ctenophora | 2. | Porifera |
| 3. | Protochordata | 4. | Echinodermata |
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All the following would be characteristics of a general reptile except:
1. Dermal scales or scutes
2. Poikilothermy
3. Direct development
4. Heart is usually three chambered
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The number of correct statements regarding hemichordates from the given is:
| I: | A stomochord is present in the collar region |
| II: | Circulation is of open type |
| III: | Excretory organ is proboscis gland |
| IV: | Development is indirect |
| 1. | 1 | 2. | 2 |
| 3. | 3 | 4. | 4 |
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Which of the following statements regarding Chondrichthyes may not be true for majority of members of the class?
| 1. | Notochord is persistent throughout life. |
| 2. | Skin has placoid scales. |
| 3. | Fertilization is internal. |
| 4. | Mouth is located ventrally. |
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