Previous Year Questions
2025
ZOOLOGY — HONOURS
Paper : DSCC-5
(Non-Chordate Structure and Function)
Full Marks : 75
Section - A
1. Answer any ten questions :
2 × 10
(a) Differentiate between pseudocoelom and true coelom.
(b) What is mesoglea? Mention its role.
(c) What do you mean by pentamerous symmetry?
(d) Name one example each for protostomes and deuterostomes.
(e) In which animal triaxon type of spicules are observed?
(f) What is cnidoblast? Where do you find it?
(g) What do you mean by true metamerism? Where is it observed?
(h) Differentiate between protonephridia and metanephridia.
(i) What is the significance of arthrodial membrane?
(j) Name respiratory and excretory organ of Macrobrachium sp.
(k) Mention the significance of stomochord.
(l) Mention the function of radula. Where is it found?
(m) Name two larval forms of echinoderms.
(n) Write the location and function of Aristotle's lantern.
(o) Mention the evolutionary significance of onychophorans.
Section - B
Answer question no. 2 and any four from the rest.
2. Write short notes on (any three) :
5 × 3
(a) Modification of polyp forms in Siphonophora
(b) Syconoid canal system
(c) Affinities of Hemichordates
(d) Origin of Metazoa
(e) Recent concept in amoeboid locomotion.
3. Justify Pila's amphibious mode of life. Explain schizocoely and enterocoely regarding the development of coelom. Describe the types of spicules with suitable diagram. 3+2+(3+2)
4. Describe conjugation in Paramoecium sp. What is the significance of metagenesis in Obelia sp.? What is the location and function of osphradium? 6+2+2
5. Differentiate between polychaeta and oligochaeta with examples. What are the functions of anterior and posterior suckers in class Hirudinea? Write common name and scientific name of any one soft coral. Write two characters of phylum Sarcomastigophora. 4+2+2+2
6. Mention the reasons why : 2½ × 4
(a) Ascaris sp. belongs to phylum Nematoda
(b) Macrobrachium sp. belongs to class Malacostraca
(c) Pinctada belongs to class Bivalvia
(d) Aurelia belongs to class Scyphozoa.
(a) Ascaris sp. belongs to phylum Nematoda
(b) Macrobrachium sp. belongs to class Malacostraca
(c) Pinctada belongs to class Bivalvia
(d) Aurelia belongs to class Scyphozoa.
7. How will you identify Ctenophora? Give one example. Describe the nervous system of Pila sp. with suitable diagram. Mention the threats of coral reef. (1+1)+(3+2)+3
8. Describe the water vascular system in Starfish with suitable diagram. What is the significance of zooxanthellae in coral reef formation? Briefly discuss torsion in gastropod molluscs. (3+2)+2+3
9. Explain the affinities of echinoderm larva with chordates. Mention salient features of phylum Echinodermata. Mention the functions of ostia and osculum. What is pinacocyte? 3+3+2+2
Comments
Post a Comment