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B.Sc (IV Semester) Examination
ZOOLOGY
Paper : ZOO/T4/241
( Physiology and Developmental Biology )
Full Marks : 50
Pass Marks : 35%
Time : Two Hours
Note : 1. Attempt answers as per the instructions.
2. The figures in the margin indicate full marks for the questions.
1. Answer all questions : 2×5=10
(a) How many types of blood groups are present?
(b) Define osmoregulation.
(c) Name two hormones secreted from pituitary gland.
(d) Development of an egg without fertilization is called what?
(e) Which hormone is responsible for metamorphosis in tadpole?
2. Answer any four of the following questions : 4×4=16
(a) Describe the process of absorption of carbohydrate in mammals.
(b) Describe the structure of excretory system in human.
(c) Differentiate between paracrine and autocrine systems.
(d) Write a short note on fertilizin antifertilizin reaction.
(e) Define and describe in vitro fertilization.
3. Answer any three of the following questions : 8×3=24
(a) Describe the mechanism of blood coagulation in mammals.
(b) Draw and describe the structure of a neuron. How do neurons communicate with one another?
(c) Discuss about the role of pituitary hormones. How does pituitary gland control other glands?
(d) Describe the process of oogenesis with the help of labelled diagram.
(e) Describe the hormonal regulation of metamorphosis in insects.
