CBSE Class 12 Biology Set-II Solved Question Paper 2012

CBSE Biology Set- II Solved Question Paper 2012, given here.

Here you can find Biology Solved Question Paper. Save your time and take the help while solving the Biology question paper set-II this paper will help you in scoring exceptionally well mark in Biology paper

Some solved questions from CBSE Class 12th Biology Question Paper (Set-II) are given here

Q. Mention the unique flowering phenomenon exhibited by Strobilanthus kunthiana (neelakuranaji).
Answer. Strobilanthus kunthianus plant produces flowers once in 12 years which is its unique flowering phenomenon.

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Q. How does smoking tobacco in human lead to oxygen deficiency in their body?
Answer. Smoking of tobacco leads to the reduction of the concentration of haemoglobin -bound oxygen in blood and increases carbon monoxide (co) content which directly causes oxygen deficiency in the body.

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Q. A garden pea plant (A) Produced inflated yellow pod, and another plant (B) of the same species produced constricted green pods. Identify the dominant traits.
Answer. The dominant trait is yellow seeds over the trait producing constricted green seeds.

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Q. Why is Eichhornia crassipes nicknamed as “Terror of Bengal”?
Answer. The plant Eichhornia crassipes is nicknamed as the ‘Terror of Bengal” because it grows at a startling rate and spreads on the surface of the water body. This cut out of the light and it also causes an increase in the oxygen demand. Thus causing death of fishes and other aquatic organisms.

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Q. Write the location and function of the sertoli cells in humans.
Answer. Sertoli cells are located in the testis. Function of Sertoli cells is to provide nutrition to the developing sperm cells.

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Q. Name the following:
(a) The semi-dwarf variety of wheat which is high-yielding and disease-resistant.
(b) Any one inter-specific hybrid mammal.
Answer.
(a) Sonalika and Kalyan Sona are the semi-dwarf varieties of wheat that are high-yielding and disease resistant.
(b) The most common interspecific hybrid mammal  is Mule.

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