CSS Botany Past Paper 2014
Paper-I
PART-2(Subjective) 80 Marks
Attempt ONLY FOUR Questions from PART-II. (20×4)
PART-II
Q2. Describe the salient features of group Chlorophyta with particular emphasis on morphology and structural organization.
Q3. Give an illustrated account of the life cycle of a smut fungus.
Q4. Define Stele. Describe its various types along with their evolutionary significance.
Q5. Write down a comparative account of stem anatomy of gymnosperms and angiosperms.
Q6. Write down the important characteristics of musci and discuss evolutionary trends of the group.
Q7. Describe artificial and natural systems of classification of plants, providing the merits and demerits of each system.
Q8. Write down comprehensive notes on any 2 of the following:
(a) Anomalous Secondary Growth
(b) Economic Importance of Red Algae
(c) Distinct characters and important genera of family Malvaceae.
Paper-II
PART-2(Subjective) 80 Marks
Attempt ONLY FOUR Questions from PART-II. (20×4)
PART-II
Q2. Describe the structure, biosynthesis, mode of action, and physiological functions of gibberellins.
Q3. Differentiate between Respiration and Photorespiration. Elaborate on the mechanism of photorespiration along with structural formulae. Which types of cellular organelles are involved in this process?
Q4. Environmental factors are crucial for plant growth. How do various climatic, edaphic, and biotic factors affect plant growth?
Q5. Soil erosion is a major problem in Pakistan. What are the causes of soil erosion? How is soil erosion reclaimed? Justify your answer with respect to this problem in Pakistan.
Q6. Differentiate between mitosis and meiosis. In which types of cells do mitosis or meiosis occur? How is meiosis significant for living organisms?
Q7. What are codons and the genetic code? Elucidate the structure of a gene. Succinctly describe the process of gene regulation in eukaryotes.
Q8. List and describe various theories about the process of evolution. Elaborate on this process with reference to the theory of Neo-Lamarckism. What were the objections to this theory?