- 1(current)
Q. No.Regarding the cell shown in the given figure:
| I: The name Cnidaria is derived from this cell |  |
| II: The stinging capsule present in the cell is called as nematode | |
| III: These cells help cnidarians in anchorage, defence and in capturing the prey |
1. While I and II are correct, III is incorrect
2. I, II and III are correct
3. Only II is incorrect
4. Only I is correct
Subtopic: Phylum Coelenterata |
52%
From NCERT
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Identify the incorrect statement regarding animals belonging to the Phylum Cnidaria:
| 1. | Gastrovascular cavity has a single opening, mouth on hypostome. |
| 2. | Corals are cnidarians and have a skeleton of calcium carbonate. |
| 3. | They exhibit tissue level of organization and are diploblastic. |
| 4. | Digestion is exclusively intracellular. |
Subtopic: Phylum Coelenterata |
83%
From NCERT
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Stinging cells seen in Cnidaria that help them catch their prey and in their defence are called:
| 1. | Cnidoblasts | 2. | Nematocysts |
| 3. | Colloblasts | 4. | Grey cells |
Subtopic: Phylum Coelenterata |
72%
From NCERT
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Corals:
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: | are Cnidarians. |
| II: | have a skeleton composed of silica spicules and calcium chloride. |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Phylum Coelenterata |
71%
From NCERT
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Consider the following statements regarding basic body plans in Cnidaria:
| I: | Polyp is sessile and cylindrical form as seen in Hydra and Adamsia. |
| II: | Medusa is umbrella-shaped and free swimming form as seen in Aurelia. |
| 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 Coelenterata |
89%
From NCERT
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In Obelia:
| a: | both polyp and medusa forms exist during its life cycle |
| b: | metagenesis, a sort of alternation of generation, is seen |
| c: | polyps produce medusae sexually and medusae form the polyps sexually |
| 1. | only a is correct | 2. | only a and b are correct |
| 3. | only c is correct | 4. | a, b and c are correct |
Subtopic: Phylum Coelenterata |
84%
From NCERT
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Match each item in Column I with their correct match in Column II and select the answer from the codes given:
Codes:
| Column I | Column II | ||
| A. | Physalia | P. | Sea-fan |
| B. | Adamsia | Q. | Sea anemone |
| C. | Pennatula | R. | Sea-pen |
| D. | Gorgonia | S. | Portuguese men of war |
| A | B | C | D | |
| 1. | S | Q | R | P |
| 2. | S | R | Q | P |
| 3. | P | Q | R | S |
| 4. | S | P | Q | R |
Subtopic: Phylum Coelenterata |
90%
From NCERT
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Consider the given two statements regarding Cnidarians:
1. Statement I is correct; Statement II is correct
2. Statement I is correct; Statement II is incorrect
3. Statement I is incorrect; Statement II is correct
4. Statement I is incorrect; Statement II is incorrect
| Statement I: | The name cnidaria is derived from the cnidoblasts or cnidocytes that are collared flagellated cells involved in water transport through the body of Cnidarians. |
| Statement II: | Polyps are free swimming Cnidarians and Medusae are sessile Cnidarians. |
2. Statement I is correct; Statement II is incorrect
3. Statement I is incorrect; Statement II is correct
4. Statement I is incorrect; Statement II is incorrect
Subtopic: Phylum Coelenterata |
58%
From NCERT
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Consider the given two statements:
| Assertion (A): | Cnidarians have a body plan based on a gastrovascular cavity. |
| Reason (R): | Cnidarians are diploblastic animals. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A) |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
Subtopic: Phylum Coelenterata |
66%
From NCERT
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- 1(current)
Q. No.
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