CSS Zoology Past Paper 2021

Instructions specific to this paper

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

Questions

1. Q. 220 marks

   Explain X-linked inheritance with the description of hemophilia disease in humans.

2. Q. 320 marks

   Describe cellular processes that occur in various phases of cell cycle.

3. Q. 420 marks

   How the theory of evolution was incorporated into the science of Taxonomy?

4. Q. 520 marks

   Discuss the evidence that link hemichordate with chordate animals.

5. Q. 620 marks

   Discuss the integumentary system in invertebrates.

6. Q. 720 marks

   How evolution is reflected in body plans of animal kingdom?

7. Q. 820 marks

   Explain the action of hormones on membrane bound and nuclear receptors.

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.