CSS past papers · 2021
CSS 2021 Botany Past Paper
Download and review the CSS 2021 Botany Past Paper on CSS Vista, with archive details, related papers and a direct PDF link for examination preparation.
Paper details
- Examination
- CSS
- Year
- 2021
- Subject
- Botany
- Paper
- Single Paper
- Subject type
- Optional
- Mode
- Subjective
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Questions recorded from this paper
These 7 question wordings are transcribed from CSS Vista’s structured Botany past-paper record for CSS 2021.
- Q2 · Life History and Economic importance of the main groups of AlgaeCynophyta (Blue green algae) is a main group of algae. What is the economic (20) importance of this particular group in food and hunger? Illustrate your answer with examples?
- Q7 · Bryology: Structure and reproduction of bryophytes, Evolution of Gametophyte and SporophyteHow are Gametophyte and Sporophyte evolved in Bryophytes? (20)
- Q4 · Peteridophyta and GymnospermsWhat is the specificity of enzyme action? Explain it with reference to the important (20) enzyme “Ribulose-1, 5-Bisphosphate Carboxylase-Oxygenase” (RuBisCO).
- Q5 · Secondary growth in dicot stemDifferentiate between Vascular cambium and Cork cambium. Describe their role in (20) secondary growth.
- Q3 · Plant PhysiologyWhat are the physiological roles of Cytokinins and Abscisic Acid in plant growth? (20)
- Q6 · cell senescence and cell deathWrite a note on cell senescence and cell death. (20)
- Q8 · EvolutionWrite a note on any TWO of the followings: (10 each) (20) (a) Hardy – Weinberg’s Law (b) Evidences of Evolution (c) Theory of Natural Selection