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Taxonomic Hierarchy

Cnidocytes of...

Question

Cnidocytes of concentrates

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Solution

Cnidocyte, also known as Cnidoblast or Nematocyte, is a stinging cell present in Cnidarians(example-Jelly fishes). They are explosive and sting hard for offence and defence. They bear venom for paralysing the prey.

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Q. Match the columns and choose the correct options

I	II	III
(1) Cnidocytes	(a) Ctenoplana	(i) Balancing
(2) Statocyst	(b) Fasciola	(ii) Defense
(3) Radula	(c) Pennatula	(iii) Feeding
(4) Flame cells	(d) Locusta	(iv) Locomotion
(5) Comb plates	(e) Pila	(v) Osmoregulation

Q. Which of the following statements regarding coelenterates are wrong?
I. Cnidocytes are present on the tentacles and on the body
II. They are diploblastic and have cellular level of organisation
III. Polyp forms are free-swimming
IV. They exhibit metagenesis
V. Polyps produce medusae sexually and medusae form polyps asexually

Q. 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

Give two examples of concentrates.

Q. Microeconomics concentrates on the study of ____________.

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