CBSE Class 12 Biology Question Paper Foreign with Answers 2017 (1)

CBSE Class 12 Biology Question Paper Foreign with Answers 2017 (1). Students can download the last year question papers using the link below. Free download of examination question papers with solutions. Last 10 year question papers should be practised to get better marks in examinations. For more study material for biology please click here - important questions for class 12 biology chapter wise.

BIOLOGY (Theory)

SECTION A

1. Name the vegetative propagules in (i) Potato, and (ii) Pistia.

2. Mention the combination(s) of sex chromosomes in a male and a female bird.

3. A region of a coding DNA strand has the following nucleotide sequence : 

   – A T G C –

What shall be the nucleotide sequence in (i) sister DNA segment it replicates, and (ii) m-RNA polynucleotide it transcribes ?

4. List the type of cry genes that provide resistance to corn plants and cotton plants respectively against lepidopterans. 

5. Very small animals are rarely found in polar regions. Give two reasons.

Check out this link also- important questions for class 12 biology chapter wise pdf

SECTION B

6. Mention the relationship between concentration of luteinising hormone and maintenance of endometrium in the human uterus.

7. Explain codominance with the help of one example.

                                              OR

What do the forelimbs of whales, bats and cheetah with respect to evolution signify ? Provide one such example in plants.

8. What is outbreeding ? Mention any two ways it can be carried out.

9. State how does ex-situ conservation help in protecting biodiversity.

10. Explain the relationship between green house gases and global warming.

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