CBSE Class 12 Biology Evolution (1). 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.
ONE MARK QUESTIONS
1.What causes speciation according to Hugo de Vries?
2.Mention the type of evolution that has brought the similarity as seen in potato tuber and sweet potato.
TWO MARK QUESTION
3.How do Darwin’s finches illustrate adaptive radiation?
4.How is Darwin’s concept of evolution different from de Vries?
5.What is divergent evolution? Explain taking an example of plants.
6.Why are the wings of butterfly and birds said to be analogous organs? Name the type of evolution of which the analogous organs are a result of.
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