Grade 12 Botany 2071 Pastpaper

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Botany

Grade 12 , 2071

Regular Examination Paper

Full Marks : 37.5
Pass Marks : 17.5
Time : 01:30:00
Q.NO. 1 (d)

What does it mean by trait?     

[Marks : 1 ] Show Ans
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Q.NO. 3 (o)

76. 2069 3  OR

Describe   the experiment (Moll's  apparatus)   in  detail    showing   the   necessity  of carbon dioxide  during photosynthesis.

[Marks : 7.5 ] Show Ans
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Set C Q.NO. 1 (a)

Mention two elements of phloem.

[Marks : 1 ] Show Ans
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Set C Q.NO. 1 (b)

Define transpiration.

[Marks : 1 ] Show Ans
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Set C Q.NO. 1 (c)

What do you mean by hydrotropism?

[Marks : 1 ] Show Ans
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Set C Q.NO. 1 (e)

Illustrate about RNA.

[Marks : 1 ] Show Ans
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Set C Q.NO. 1 (f)

Define vegetative propagation.

[Marks : 1 ] Show Ans
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Set C Q.NO. 1 (g)

Elaborate microsporoqenesis

[Marks : 1 ] Show Ans
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Set C Q.NO. 1 (h)

What is fertilization?

[Marks : 1 ] Show Ans
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Set C Q.NO. 1 (i)
 
What do you mean by callus culture?
[Marks : 1 ] Show Ans
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Set C Q.NO. 1 (i')
 
 

Mention about bio-fertilizer.

[Marks : 1 ] Show Ans
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Set C Q.NO. 2 (a)
 

Structure and function of collenchyma. 

[Marks : 2 ] Show Ans
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Set C Q.NO. 2 (b)

Characteristics of C4 plants with examples.

[Marks : 3 ] Show Ans
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Set C Q.NO. 2 (c)

Law of independent assortment.        

[Marks : 3 ] Show Ans
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Set C Q.NO. 2 (d)

Answer in brief Significance of polyploidy   with examples

[Marks : 3 ] Show Ans
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Set C Q.NO. 2 (e)

Difference between incomplete and co-dominace.   

[Marks : 3 ] Show Ans
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Set C Q.NO. 2 (f)
 

Development of monocot embryo

[Marks : 3 ] Show Ans
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Set C Q.NO. 2 (g)
Application of genetic engineering in medicine
[Marks : 3 ] Show Ans
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Set C Q.NO. 3

Define photosynthesis and describe any experiment regarding   the photosynthesis studied by you. 

[Marks : 7.5 ] Show Ans
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Set C Q.NO. 3 (or)

Describe the T.S.  Of monocot and dicot leaf with necessary diagram.   

[Marks : 7.5 ] Show Ans
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Set C Q.NO. 4

Define crossing over and describe its mechanism with necessary diagrams along with its significance.

[Marks : 8 ] Show Ans
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Set D Q.NO. 1 (a)

Define collenchymas.

[Marks : 1 ] Show Ans
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Set D Q.NO. 1 (b)

What is diffusion?

[Marks : 1 ] Show Ans
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Set D Q.NO. 1 (c)

Define secondary growth.

[Marks : 1 ] Show Ans
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Set D Q.NO. 1 (d)

What does it mean by mutation?

[Marks : 1 ] Show Ans
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Set D Q.NO. 1 (e)

Define homozygous.

[Marks : 1 ] Show Ans
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Set D Q.NO. 1 (f)

What is grafting? 

[Marks : 1 ] Show Ans
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Set D Q.NO. 1 (g)

Define megasporogenesis.

[Marks : 1 ] Show Ans
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Set D Q.NO. 1 (h)
What is self pollination?
[Marks : 1 ] Show Ans
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Set D Q.NO. 1 (i)
 
What is tissue culture?
[Marks : 1 ] Show Ans
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Set D Q.NO. 1 (j)
 

Define vaccines.

[Marks : 1 ] Show Ans
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Set D Q.NO. 2 (a)
 

Structure and function of phloem tissue

[Marks : 2 ] Show Ans
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Set D Q.NO. 2 (b)

Describe the use of cytokinis.

[Marks : 3 ] Show Ans
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Set D Q.NO. 2 (d)

Describe   the law of dominance.

[Marks : 3 ] Show Ans
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Set D Q.NO. 2 (e)

Describe in detail about chromosomal mutations.

[Marks : 3 ] Show Ans
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Set D Q.NO. 2 (f)
 

Describe the development of dicot embryo.

[Marks : 3 ] Show Ans
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Set D Q.NO. 2 (g)

Elaborate the fermentation technology and its application.

[Marks : 3 ] Show Ans
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Set D Q.NO. 3

Draw a well labeled diagram of T.S.  of monocot  stem  and  point  out  its  differences  with dicot stem.

[Marks : 7.5 ] Show Ans
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Set D Q.NO. 3 (or)

Define transpiration, and describe an experiment to show   the   rate of   transpiration   by Ganong's photometer.

[Marks : 7.5 ] Show Ans
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