No. of Printed Pages : 8

LSE-09 I

BACHELOR OF SCIENCE (B.Sc.) Term-End Examination

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June, 2012

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LIFE SCIENCE

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LSE-09 : ANIMAL DIVERSITY-I Time : 3 Hours

Maximum Marks : 75

Note : Question no. 1 is compulsory. Attempt any six questions from question no. 2 to 8. 1.

(a)

Fill in the blanks : (i) Viruses can reproduce only inside a (ii)

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Adult Echinoderms show symmetry.

(iii) Hair, epidermis of the skin and spinal cord are derived from the germ layer (iv) Haemocyanin contains as the prosthetic group. (v) The mosquito larvae are called (b) Define the following : (i) Gallery Dwellers (ii) Agamout (iii) Neuroglia (iv) Polymorphism. LSE-09

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3 (c) Match the terms given under column A with those given under column B. Column B Column A Pseudocoel (i) (a) Trypanosoma (ii) Bipinnaria Larva (b) Nematoda (iii) Hematopha gous (c) Chilopoda feeder (iv) Sleeping (d) Asteroidea sickness (v) Silk (e) Leech (vi) Organ of Bombyx mori (f) Tomosvary (d) State whether the following statements are True (T) or False (F). (i) Antennary glands or maxillary glands are the excretory organs in crustaceans. (ii) Aristotle's lantern is a complex chewing organ in sea urchins. (iii) Euryhaline animals can tolerate only narrow ranges of salinities. (iv) Centipedes and ants can be regarded as scavengers. (v) Coelomic fluid does not take any part in the transportation of food and waste in earth worms. (vi) Colonial theory is the most popular theory on the origin of metazoa. LSE-09

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2.

3.

(a) Explain the principle and scheme of five kingdom classification.

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(b) Describe the process of nutrition in protozoa with suitable diagrams.

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(a) Give any two most distinctive features of the

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poriferous and characters of its classes in relation to endoskeleton. (b) Discuss the process of torsion and its effects on gastropods.

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4.

Give an account of respiration in insects with the help of diagrams.

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5.

Write short notes on :

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7.

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Epitoky in polychaetes

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(b)

Syngamy

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(a) Wrtie any five effects of parasitism on parasites.

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(b) What is coelom ? Explain the two ways of coelom formation in Metazoans.

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Describe the life cycle of malarial parasite explaining the phenomenon of alternation of generations.

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8.

(a) Name any two pests of sugarcane and describe the damages caused by them. (b) Discuss the role of Arthropods as the vectors of human diseases.

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