CSS Botany Past Paper 2006
Paper-I
PART-2(Subjective) 80 Marks
Attempt ONLY FOUR Questions from PART-II. (20×4)
PART-II
Q. No. 2
(a) Describe the general characteristics of Pteridophytes.
(b) Enlist the important characteristics which are common to both pteridophytes and gymnosperms.
Q. No. 3
(a) Discuss cell structure, methods of reproduction and importance of blue-green algae.
(b) Draw a graphic representation of the life cycle of Volvox.
Q. No. 4
(a) Describe the causing organisms, symptoms and possible methods to control the following plant diseases:
(1) Rust
(2) Loose and covered smut
(3) Damping Off
(4) Early Blight of Potato
(b) Write a note on parasexuality
Q. No. 5
(a) What is secondary growth? Describe the events leading to secondary growth in a typical dicotyledonous stem
(b) Write notes on:
(1) Abscission layer
(2) Procambium
Q. No. 6
(a) Describe different types of stomata present in plants
(b) Write notes on:
(1) Medullary bundles
(2) Nodal anatomy
(3) Golgi complex
(4) Cork cambium
Q. No. 7 Draw properly labeled diagrams of the following:
(a) L.S. of Funaria capsule
(b) T.S. of Cycas leaflet
(c) L.S. of Dicot stem
(d) Graphic life cycle of Polysiphonia
Q. No. 8
(a) What is nomenclature? Describe the history and principles of nomenclature
(b) Explain the role of anatomy and cytology in relation to taxonomy
(c) Describe any six rules of nomenclature
Paper-II
PART-2(Subjective) 80 Marks
Attempt ONLY FOUR Questions from PART-II. (20×4)
PART-II
Q. No. 2
(a) Discuss the uptake and role of Nitrogen and Phosphorous in green plants
(b) How would you determine whether a plant nutrient is essential or non-essential?
Q. No. 3
(a) What do you know about plant growth hormones? Discuss the role of Cytokinins in plants
(b) Write a short note on Vernalization
Q. No. 4
(a) Discuss the process of CO2 fixation in C3 plants. How does it differ from C4 plants?
(b) Draw a figure to show the cyclic and non-cyclic photophosphorylation in plants
Q. No. 5
Write notes on the following:
(a) Glycolysis
(b) Ammonia assimilation in plants
(c) Energy flow in Ecosystem
(d) Soil texture
Q. No. 6
(a) What is soil salinity and water logging? Describe their causes and methods of soil reclamation with particular reference to Pakistani soils.
(b) Enlist the major sources of air, water, and soil pollution
Q. No. 7
(a) What do you know about linkage and crossing over?
(b) What is polyploidy? Discuss its importance
(c) Write a note on genetic code
(d) What is meiosis? Discuss its significance
Q. No. 8
(a) Briefly discuss different theories of evolution. Which theory do you think best explains the process of evolution and why?
(b) Write a note on adaptive mutations