CSS Botany Past Paper 2021
PART-2(Subjective) 80 Marks
Attempt ONLY FOUR Questions from PART-II. (20×4)
PART-II
Q. No. 2 Cynophyta (Blue-green algae) is a main group of algae. What is the economic importance of this particular group in food and hunger? Illustrate your answer with examples.
Q. No. 3 What are the physiological roles of Cytokinins and Abscisic Acid in plant growth?
Q. No. 4 What is the specificity of enzyme action? Explain it with reference to the important enzyme “Ribulose-1, 5-Bisphosphate Carboxylase-Oxygenase” (RuBisCO).
Q. No. 5 Differentiate between Vascular cambium and Cork cambium. Describe their role in secondary growth.
Q. No. 6 Write a note on cell senescence and cell death.
Q. No. 7 How are Gametophyte and Sporophyte evolved in Bryophytes?
Q. No. 8 Write a note on any TWO of the following:
(a) Hardy-Weinberg’s Law
(b) Evidences of Evolution
(c) Theory of Natural Selection