CSS Botany Past Paper 2017
PART-2(Subjective) 80 Marks
Attempt ONLY FOUR Questions from PART-II. (20×4)
PART-II
Q. No. 2 Describe briefly the habitat, structure, reproduction, and life cycle of Adiantum.
Q. No. 3 Discuss the evolution of seed and its importance in vascular plants.
Q. No. 4 Why is Darwin’s theory of evolution still so controversial? Explain.
Q. No. 5 How does the C4 pathway differ from the C3 pathway of carbon fixation? What are the advantages and disadvantages of each pathway?
Q. No. 6 How did the discovery that the DNA molecule is helical with a uniform 2-mm diameter lead Watson and Crick to propose the pairing rules for the double-helix model? Explain.
Q. No. 7 Describe the causes and reclamation of soil salinity and waterlogging in Pakistan.
Q. No. 8 Write short notes on any FOUR of the following:
(a) Forensic Palynology
(b) Chemo taxonomy
(c) Imperfect Fungi
(d) Chromosomal aberrations
(e) Economic importance of Acacia Family