Match the features listed under column I with their animal groups under column II and choose the correct option:

Column I Column II

1. Cnidocytes p. Vertebrates

2. Choanocytes q. Flatworms

3. Flame cells r. Sponges

4. Pseudocoelom s. Coelenterates

t. Roundworms

1 = q, 2 = r, 3 = s, 4 = t

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1 = r, 2 = s, 3 = t, 4 = p

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1 = s, 2 = r, 3 = q, 4 = t

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1 = s, 2 = r, 3 = q, 4 = p

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Solution

The correct option is C 1 = s, 2 = r, 3 = q, 4 = t
Cnidocytes are stinging cells used for defense by Cnidarians (Coelenterates). Choanocytes refer to the collar cells seen in the body wall of sponges. Flame cells (solenocytes) help in excretion and osmoregulation in flatworms. Pseudocoelom or false coelom is characteristic of the Phylum Aschelminthes which includes the roundworms.

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Column I	Column II
1. Cnidocytes	p. Vertebrates
2. Choanocytes	q. Flatworms
3. Flame cells	r. Sponges
4. Pseudocoelom	s. Coelenterates
	t. Roundworms

Match the features listed under column I with their animal groups under column II and choose the correct option: Column I Column II 1. Cnidocytes p. Vertebrates 2. Choanocytes q. Flatworms 3. Flame cells r. Sponges 4. Pseudocoelom s. Coelenterates t. Roundworms

Match the features listed under column I with their animal groups under column II and choose the correct option:

Column I Column II

1. Cnidocytes p. Vertebrates

2. Choanocytes q. Flatworms

3. Flame cells r. Sponges

4. Pseudocoelom s. Coelenterates

t. Roundworms