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Q. No.The characteristics of osteichthyes include:
I:
Four pairs of gills covered by an operculum on each side
II:
Skin covered with placoid scales
III:
Regulation of buoyancy by an air bladder
1. Only I and II
2. Only II and III
3. Only I and III
4. I, II and III
Subtopic: Comparative study of Cartilagenous & Bony Fishes |
73%
From NCERT
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Hippocampus [sea horse] is a:
1. marine bony fish
2. fresh water bony fish
3. cartilaginous fish
4. limbless amphibian
1. marine bony fish
2. fresh water bony fish
3. cartilaginous fish
4. limbless amphibian
Subtopic: Comparative study of Cartilagenous & Bony Fishes |
80%
From NCERT
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Consider the given statements:
The number of correct statements is:
1. 2
2. 3
3. 4
4. 5
| I: | Annelids are metamerically segmented animals with a true coelom. |
| II: | Arthropods are the most abundant group of animals characterised by the presence of jointed appendages. |
| III: | Molluscs have a soft body surrounded by an external calcareous shell. |
| IV: | Echinoderms possess a spiny skin. |
| V: | Hemichordates are fresh water animals. |
The number of correct statements is:
1. 2
2. 3
3. 4
4. 5
Subtopic: Phylum Annelida | Phylum Arthropoda | Phylum Mollusca | Phylum Echinodermata | Phylum Hemichordata |
72%
From NCERT
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Most vertebrates:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | possess a jaw |
| II: | have a cartilaginous endoskeleton |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Phylum Chordata |
60%
From NCERT
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Study the Assertion statement followed by the Reason statement given below:
| Assertion (A): | The digestive system in Platyhelminthes is called incomplete. |
| Reason (R): | Platyhelminthes are mostly endoparasites found in animals including human beings. |
| 1. | (A) is True but (R) is False. |
| 2. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 3. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 4. | (A) is False but (R) is True. |
Subtopic: Phylum Ctenophora & Platyhelminthes |
67%
From NCERT
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Notochord is:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | an endodermally derived rod-like structure. |
| II: | formed on the dorsal side during embryonic development in some animals. |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Phylum Chordata |
70%
From NCERT
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Aschelminthes are:
| 1. | radially symmetrical, triploblastic and pseudocoelomate animals. |
| 2. | bilaterally symmetrical, triploblastic and acoelomate animals. |
| 3. | bilaterally symmetrical, triploblastic and pseudocoelomate animals. |
| 4. | radially symmetrical, diploblastic and eucoelomate animals. |
Subtopic: Phylum Ctenophora & Platyhelminthes |
88%
From NCERT
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The type of circulatory system in which the blood is pumped out of the heart and the cells and tissues are directly bathed in it is found in all of the following except:
| 1. | Arthropods | 2. | Hemichordates |
| 3. | Most molluscs | 4. | Annelids |
Subtopic: Basis of Classification |
66%
From NCERT
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Members of Phylum Platyhelminthes typically have bodies that are ____ compressed.
1. dorso-laterally
2. bilaterally
3. ventro-laterally
4. dorso-ventrally
1. dorso-laterally
2. bilaterally
3. ventro-laterally
4. dorso-ventrally
Subtopic: Phylum Ctenophora & Platyhelminthes |
88%
From NCERT
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How many of the given statements regarding members of Porifera are correct?
1. 2
2. 3
3. 4
4. 5
| I: | They are exclusively marine. |
| II: | They have cellular level of organisation. |
| III: | They have a water vascular system with tube feet. |
| IV: | Digestion is intracellular. |
| V: | Fertilisation is external and development is direct. |
1. 2
2. 3
3. 4
4. 5
Subtopic: Phylum Porifera |
59%
From NCERT
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