CSS Zoology Past Paper 2020

Instructions specific to this paper

• Attempt ONLY FOUR questions from PART-II. ALL questions carry EQUAL marks.

Questions

1. Q. 220 marks

   Explain in detail the circulation, gas exchange and temperature regulation in reptiles.

2. Q. 320 marks

   Describe various hormones of the mammalian adrenal gland with their functions.

3. Q. 420 marks

   Write a detailed account on maintenance functions of class Arachnida.

4. Q. 520 marks

   Define linked genes. Explain in detail the inheritance of X-linked recessive genes.

5. Q. 620 marks

   Explain the body wall, digestion, nervous system and sensory organs of flat worms.

6. Q. 720 marks

   How does excretion and osmoregulation occur in mammals?

7. Q. 820 marks

   Write short notes on any FOUR of the following: (05 each) (a) Hardy-Weinberg theorem (b) Sedimentary cycle (c) Metamerism (d) Mechanism of neuron action (e) Invertebrate sensory receptors (f) Gas exchange in Mammals

Standard FPSC instructions

Printed on this and every CSS paper.

• Part-II is to be attempted on the separate Answer Book.
• All the parts (if any) of each question must be attempted at one place instead of at different places.
• Write Q. No. in the Answer Book in accordance with Q. No. in the question paper.
• No page/space be left blank between the answers. All the blank pages of the Answer Book must be crossed.
• Extra attempt of any question or any part of the attempted question will not be considered.