J I
Code--23
ZOOLOGY

'jUyillllllll A!arks !50
:ote Attempt any Fiw! questions. All questions l'alTY equal marks. Q. 1 is compulsory. Answer (1·0 questions Part I and i'rum Part I!. The parts of the same question must be answered together and must not be interposed between ansvers other questions.
1. Write critical notes on any (our of the following: (4x7YI=30)
Polymorphism in Hydrozoa
Induced breeding in Carps
The role of pheromones 111 sexual behaviour
Spontaneous and induced mutation
Concept of species and subspecies
Mammalian placental types and their functions.


2.
Give an account of the canal system III Sponges. Explain the course of water circulation. How does the water flow maintained and adjusted What is the significance of canal system to sponge life no}

3.
Describe the dentition in mammals. Give the dental formula of man, dog and rabl)it.

4.
What do you understand by environmental pollution? How many types of pollutants exist in the biosphere? Discuss the impact of these pollutants on humans.



Part II
5. What do you understand by of fatty acids? Show different biochemical steps involved in the of fatty acids.
C-03/M-23 2

Describe the ultrastructure of skeletal muscle
and discuss the molecular mechanism of its
contraction,

7. Describe the ultrastructural morphology of mitochondria in animal cells, Explain the role of mitochondria in Krebs Cycle.
C-OVM-23
3