CSS Zoology 2006

SECTION – I

Q.1(a) Discuss PROTOZOA as UNICELLULAR and ACELLULAR organisms. (7)

(b)Define POLYMORPHISM and discuss it with reference to CEOLENTRATES. (6)

(c)"ANNELIDS have said to have true METAMERIC SEGMENTATION."(7)

Q.2.(a)"PORIFERA exhibits a Tissue level of organization". Discuss. (6)

(b)"ECHINODERMS have a close evolutionary relationship with CHORDATES”. (6)

Comment the statement.

(c)Discuss insects as the most successful group. (8)

Q.3.Write short notes on the following; - (5each)

(a)CORAL REEF

(b)COELOME

(c)TUBE FEET IN ECHINODERMS

(d)FOOT IN MOLLUSCA.

SECTION – II

Q.4.(a)"HEMICHORDATES have a mixture of CHORDATE and NON-CHORDATE characters. Explain. (10)

(b)"ALL the CHORDATES character are present in Ascidia in larval stage". Discuss. (10)

Q.5.(a)Write an essay on biting mechanism of snakes. (8)

(b) Discuss the different adaptation to flight with reference to birds. (12).

Q.6.(a)Describe placentation in mammals. (9)

(b)Write a short essay on different types of scales found in fishes (11).