2019
(December)
ZOOLOGY
(Generic Effective)
Full Marks: 53
Pass Marks: 21
Time: 3 hours
The figures in the margin indicate full marks for the questions
Paper: GE-1 (A)
(ANIMAL DIVERSITY)
1. Fill in the blanks: 1x5=5
a) Plasmodium belongs to the phylum _________.
b) _________ is the simplest type of canal system in Porifera.
c) Insects possess _________ pairs of legs.
d) Amphibian heart is _________ chambered.
e) The main locomotory organ of starfish is _________.
2. (a) Answer any two of the following questions:
1) Write two salient features of protochordates. 2½x2=5
2) Mention two basic characters of Porifera. 2½x2=5
3) In which phylum the polyp and medusa are found? Mention two differences of polyp and medusa. 1+4=5
(b) Write short notes on (any two): 2½x2=5
1) Choanocyte.
2) Social insects.
3) Scolex of Taenia solium.
3. What is canal system? Describe the different types of canal systems of Porifera with labeled diagram. 1+6=7
4. Write short notes on (any two): 3x2=6
a) Parasitic adaptation in Nemat-helminthes.
b) Asexual cycle of Plasmodium.
c) Metamerism in annelids.
d) Three characteristic features of Mollusca.
5. Write two main characteristic features of echinoderms. Describe water vascular system in starfish with a labeled diagram. 2+5=7
Or
Why do fishes migrate? Explain briefly about fish migration with suitable example. 2+5=7
6. Mention two main characteristic features of Amphibia. Discuss about the parental care in Amphibia. 2+5=7
Or
What is amniote? Describe about the origin of reptiles. 2+5=7
7. What is dentition? Describe briefly about dentition in mammals. 1+5=6
Or
What is primate? Write a note on the early evolution of mammals. 1+5=6
Paper: GE-1 (B)
(AQUATIC BIOLOGY)
1. Answer any five questions: 1x5=5
a) What is the full form of COD?
b) Give one example of an estuary.
c) What is eutrophication?
d) What do you mean by sewage treatment?
e) Give two examples of benthic invertebrates.
f) What is intertidal zone?
2. Write short notes on (any three): 2x3=6
a) Sea weeds.
b) Stream development.
c) Coral reefs.
d) Cold water fishes.
e) Continental shelf.
3. Distinguish between BOD and COD. 4
4. What are the roles of dissolved gases in lakes? 5
Or
Describe how heart and oil spills cause water pollution. 2½ x 2½=5
5. What is lake? Write about the origin and classification of lakes. 1+2+2=5
Or
Write in brief about the ecology of river. 5
6. What is wetland? What are the different types of wetlands? Write a note on the usefulness of wetlands. 1+3+3=7
Or
Give a description of the major wetlands of Assam. 7
7. What is adaptation? Describe the adaptation of hill streams fishes. 1+6=7
Or
Define adaptation. Describe the adaptation of deep sea organisms. 7
8. Write the physic-chemical characteristics of a typical lake. 7
9. What are the major invertebrates and vertebrates found in wetlands of Assam? 3+4=7
Or
Define water pollution. Describe the industrial and agricultural causes of water pollution. 1+3+3=7
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