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  • 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 |
Level 3: 35%-60%
Hints
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 |
 84%
Level 1: 80%+
Hints
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 |
 70%
Level 2: 60%+
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Corals:
I: are Cnidarians.
II: have a skeleton composed of silica spicules and calcium chloride.
 
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 |
 73%
Level 2: 60%+
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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 |
 91%
Level 1: 80%+
Hints
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 |
 74%
Level 2: 60%+
Hints
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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:
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
Codes:
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 |
 91%
Level 1: 80%+
Hints
Consider the given two statements regarding Cnidarians:
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.
 
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
Subtopic:  Phylum Coelenterata |
 59%
Level 3: 35%-60%
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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 |
 71%
Level 2: 60%+
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