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HSC Science (General) इयत्ता १२ वी - Maharashtra State Board Question Bank Solutions

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Write a short note on ‘Mutational breeding’.

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Name the high-yielding semi-dwarf varieties of wheat selected and introduced in India in 1963.

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Give reason :
Emasculation is done in a flower which is selected as female parent.

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What is ‘biofortification’?

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Which steps would you follow to develop a new variety of crop plant by selective breeding?

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What is plant breeding?

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Name the genes responsible for making Bt cotton plants resistant to bollworm attack. How do such plants attain resistance against bollworm attacks? Explain.

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In Brassica (rapeseed, mustard)........................ varietys is resistant to Aphids.

(a) Pusa A-4
(b) Pusa Gaurav
(c) Pusa Sawni
(d) . Pusa Shubra

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Give an example of the source of thermostable enzyme DNA polymerase.

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Vijaya, Padma, Kanti and Jayanti are high-yielding varieties of ______.

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What are plasmids?

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Give the names of ‘two’ insect-resistant crop varieties.

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What is emasculation?

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What are transgenic plants? Explain with any two examples

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With the help of suitable diagram define 'bagging' and 'tagging' of  flower.

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Define Osmotic pressure.

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What is Biofortification? Explain selective breeding with suitable example.

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Answer each question in ‘One’ sentence only:

Define stock and scion.

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The biological scissor is ______.

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Give the applications of the PCR technique.

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