Posted: 19 Jan 2018 10:22 PM PST
(Download) CBSE Class-12 Sample Paper And Marking Scheme 2017-18 : Biology
Section – A
1. A tissue, of a tobacco plant, infected with TMV was used to obtain a new plant. Identify the technique used and reason out the possibility of obtaining a new healthy plant. 1
6. The alarming population growth is leading to scarcity of basic requirements. Suggest with reasons, any two population control measures other than contraception to address the situation.
7. During a cytological study conducted on the chromosomes of the insects, it was observed that only 50% of the sperms had a specific structure after spermatogenesis. Name the structure and write its significance in sex determination of insects.2
11. Draw the diagram of microsporangium of an Angiosperm and label any four parts State the function of its innermost wall layer. 3
Posted: 19 Jan 2018 10:21 PM PST
(Download) CBSE Class-10 Sample Paper And Marking Scheme 2017-18 :
Elements of Business
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