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 |
Radially symmetrical animals:
| 1. | Are all triploblastic |
| 2. | Tend to be sessile and passively floating |
| 3. | Have a definite head and a brain |
| 4. | Have an anterior and a posterior end |
1. Radula – Molluscs
2. Malpighian tubules– Insects
3. Choanocytes– Sponges
4. Cnidocytes – Ctenophora
The lungs shown in the given diagram belong to the respiratory system of:
| 1. | Amphibians | 2. | Reptiles |
| 3. | Birds | 4. | Mammals |
Perhaps the biggest reason for the enormous success of Arthropods is?
| 1. | Chitinous exoskeleton | 2. | Diverse appendages |
| 3. | Respiration by tracheoles | 4. | Internal fertilization |
In which one of the following, the genus name, its two characters and its phylum are not correctly matched, whereas the remaining three are correct?
| Genus Name | Two Characters | Phylum | ||
| 1. | Pila | (i) (ii) |
Body segmented Mouth with Radula |
Mollusca |
| 2. | Asterias | (i) (ii) |
Spiny skinned Water Vascular System |
Echinodermata |
| 3. | Sycon | (i) (ii) |
Pore bearing Canal system |
Porifera |
| 4. | Periplaneta | (i) (ii) |
Jointed appendages Chitinous exoskeleton |
Arthropoda |
Which one of the following is a matching set of a phylum and its three examples?
1. Cnidaria- Bonellia, Physalia, Aurelia
2. Platyhelminthes- Planaria, Schistosoma, Enterobius
3. Mollusca- Loligo, Teredo, Octopus
4. Porifera- Spongilla, Euplectella, Pennatula
| 1. | Obelia | Metagenesis |
| 2. | Planaria | Free living with high regeneration capacity |
| 3. | Ancylostoma | Acoelomate |
| 4. | Nereis | Parapodia |
Consider the two statements:
| I. | The similarity between notochord and stomochord is due to convergent evolution. |
| II. | Both arise from a common ancestry and exhibit homology. |
| 1. | Both I and II are correct and II explains I |
| 2. | Both I and II are correct but II does not explain I |
| 3. | Only I is correct |
| 4. | Both I and II are incorrect |
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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