- 1(current)
Q. No.
Approximately what percentage of existing animal species are invertebrates?
| 1. | 20 | 2. | 50 |
| 3. | 70 | 4. | 95 |
Which one of the following pairs of animals comprises ‘jawless fishes’?
1. Guppies and hag fishes
2. Lampreys and eels
3. Mackerels and Rohu
4. Lampreys and hag fishes
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Which one of the following sets of animals belongs to a single taxonomic group?
| 1. | Cuttlefish, Jellyfish, Silverfish, Dogfish, Starfish |
| 2. | Bat, Pigeon, Butterfly |
| 3. | Monkey, Chimpanzee, Man |
| 4. | Silkworm, Tapeworm, Earthworm |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
Match the following list of animals with their level of organization.
| Division of Labour | Animal | ||
| A. | Organ level | i. | Pheritima |
| B. | Cellular aggregate level | ii. | Fasciola |
| C. | Tissue level | iii. | Spongilla |
| D. | Organ system level | iv. | Obelia |
Choose the correct match showing division of labour with animal example:
| i | ii | iii | iv | |
| 1. | B | C | D | A |
| 2. | B | D | C | A |
| 3. | D | A | B | C |
| 4. | A | D | C | B |
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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 incorrect statement regarding cyclostomes:
| 1. | Lampreys have direct development, but Hagfishes go through a larval stage followed by metamorphosis into a juvenile form. |
| 2. | Unlike jawed vertebrates, which have three semicircular canals in each inner ear, lampreys have only two and hagfishes just one. |
| 3. | The hagfish blood is isotonic with seawater, while lampreys appear to use the same gill-based mechanisms of osmoregulation as marine teleosts. |
| 4. | Both hagfishes and lampreys have a single gonad. |
Considering lampreys and hagfish:
| I. | Both groups have jawless mouths with horny epidermal structures that function as teeth. |
| II. | Both groups have branchial arches that are internally positioned instead of external as in jawed fishes. |
| 1. | Only I is correct |
| 2. | Only II is correct |
| 3. | Both I and II are correct |
| 4. | Both I and II are incorrect |
- 1(current)
Q. No.
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