Q. No.The animals belonging to all the following groups are exclusively marine except:
1.
Ctenophora
2.
Porifera
3.
Protochordata
4.
Echinodermata
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
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 |
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. |
In having external fertilization and indirect development, amphibians differ from all other:
I. Tetrapods
II. Gnathostomatans
III. Vertebrates
1. Only I
2. Both I and II
3. Only II
4. I, II and III
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 |
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 |
Identify the incorrectly matched pair:
|
Phylum |
Characteristic |
|
|
1. |
Porifera |
Water vascular system |
|
2. |
Ctenophora |
Bioluminescence |
|
3. |
Molluska |
Radula |
|
4. |
Annelida |
Closed circulatory system |
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
Triploblastic organization, bilateral symmetry but lack of coelom will be seen in:
| 1. | Planaria | 2. | Pheretima |
| 3. | Periplaneta | 4. | Pinctada |
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