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Earn 100

The chitinous exoskeleton of arthropods is formed by the polymerization of:
(a)D-glucosamine
(b)N-acetylglucosamine
(c)Lipoglycans
(d)Keratin sulphate and chondroitin sulphate

43.42% studentsanswered this correctly

Important Questions on Animal Kingdom
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Match the column I with column II for housefly classification and select the correct option using the codes given below:
Column I | Column II |
(A) Family | (i) Diptera |
(B) Order | (ii) Arthropoda |
(C) Class | (iii) Muscidae |
(D) Phylum | (iv) Insecta |

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Match the larval stages (in column I) with their corresponding animals (in column II) and select the correct option.
Column I | Column II | ||
I. | Planula | i. | Holothuria (Sea cucumber) |
II. | Trocophore | ii. | Hermit crab |
III. | Glochidium | iii. | Obelia |
IV. | Glaucothoe | iv. | Neresis |
v. | Unio |
