CBSE Class 12 Biology Question Papers SA1 2011 Set 02

CBSE Class 12 Biology Question Papers SA1 2011 (2). 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.

SECTION – A

1. Turkey usually produces females for several generations. How is this possible?

2. What do you mean by the ornithophily and chirepterophily ?

3. Name the developmental stage in humans which gets implanted in uterine wall.

4. After a successful invitro fertilization the fertilized egg begins to divide.Where is this egg transferred before it reaches the 8 – celled stage.

5. Name one autosomal dominant and one autosomal recessive mendelian disorder in humans.

6. Expend the terms : BACs and YACs.

7. Mentions the type of evolution that has brought the similarity as seen in potato tuber and sweet potato.

8. What causes speciation according Hugo – de- vries ?

SECTION – B

9. Briefly explain the functions of following with reference to immunity :

(a) T – helper cells (b) Interferons

10. The rate of appearance of new forms is linked to the life span of an organism. Explain with the help of suitable example.

Please click the link below to download pdf file of CBSE Class 12 Biology Question Papers SA1 2011 (2).