CBSE Class 12 Biology Sample Paper 2020 Solved Set A. CBSE issues sample papers every year for students for Class 12 board exams. Students should solve the CBSE issued sample papers to understand the pattern of the question paper which will come in class 12 board exams this year. The sample papers have been provided with marking scheme. It’s always recommended to practice as many CBSE sample papers as possible before the board examinations. Sample papers should be always practiced in examination condition at home or school and the student should show the answers to teachers for checking or compare with the answers provided. Students can download the sample papers in pdf format free and score better marks in examinations. Refer to other links too for latest sample papers.
1 Scientists have succeeded in recovering healthy sugarcane plants from a diseased one
a) Name the part of the plant used as explant by the scientists
b) Name this technology used for crop improvement.
2 In case of an infertile couple, the female partner produces normal ovum but is unable to provide suitable environment for further development of embryo.Which kind of ART is suited in this situation to form a foetus?
3 Name the muscular and glandular layer of human uterus.
4 List two advantages that a mycorrhizal association provides to the plant.
5 Name the product of fertilisation that forms the kernel of coconut. How does the kernel differ from coconut water?
6 What is ‘The Evil Quartet’ that has caused biodiversity loss?
7 Why have certain regions been declared as biodiversity ‘hotspots by environmentalists of the world? Name any two hotspot regions of India.
8 What is the inheritance pattern observed in the size of starch grains and seed shape of Pisum Sativum? Work out the monohybrid cross showing the above traits. How does this pattern of inheritance deviate from that of Mendelian law of dominance?
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