Q1.
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Answer any four of the following questions :
Give an account of normal secondary growth in perennial plants and its significance.
What is sterilization? Describe the different methods of sterilization used in tissue culture laboratory and microbiology.
Define plant succession. Describe the steps involved in hydrosere with diagramatic presentation.
Explain the mechanical tissues in plants and their distribution in monocot stem.
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Give salient features of Fungi and give classification by Alexopoulus.
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What is sterilization? Describe the different methods of sterilization used in tissue culture laboratory and microbiology.
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Define plant succession. Describe the steps involved in hydrosere with diagramatic presentation.
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Explain the mechanical tissues in plants and their distribution in monocot stem.
Q2.
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Define cell cycle. Explain various phases of cell cycle and describe the importance of cell cycle in the mechanism of cell division.
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Describe various types of ploidy levels in plants. Give its role in crop improvement.
Q3.
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Describe ultrastructure and chemical composition of mitochondria.
Define mass selection. Explain mass selection method of crop improvement.
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Define mass selection. Explain mass selection method of crop improvement.
Q4.
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What is Botanical Nomenclature? Explain the rules and principles of botanical nomenclature with suitable examples.
Describe structure and development of female gametophyte (embryo sac) and explain monosporic embryo sacs.
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Describe structure and development of female gametophyte (embryo sac) and explain monosporic embryo sacs.
Q5.
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Give an account of Engler and Prantl's system of plant classification with merits and demerits.
What is an endosperm? Describe the structure and different types of development of endosperms with their importance.
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What is an endosperm? Describe the structure and different types of development of endosperms with their importance.
Q6.
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What is photophosphorylation? Explain non-cyclic photophosphorylation and add a note on its significance.
Define enzymes. Give classification of enzyme and add a note on 'Lock and key' theory of mechanism.
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Define enzymes. Give classification of enzyme and add a note on 'Lock and key' theory of mechanism.
Q7.
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What are plant growth regulators? Give role and functions of Auxins in plant growth and development.
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What are C3 plants ? Describe the various steps involved in Calvin's cycle.
Q8.
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What is somaclonal variation? Describe significance of somaclonal variation.
Give an account of energy flow in an ecosystem with suitable diagram.
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Give an account of energy flow in an ecosystem with suitable diagram.
Q9.
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Describe plants used as human resources with respect to Botanical name, plant part used, active principles and uses
Fibres
Beverages
Spices and condiments
Medicinal plants
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Define pollution. Describe sources of soil pollution. Add a note on control measures.
