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Class 12th Biology Questions
BOTANY
1. Explain Microsporogenesis and megasporogenesis.
2. Give an account of Development of embryo sac in Angiosperms.
3. Explain briefly self and cross pollination.
4. Define terms: Autogamy, Geitonogamy, Anemophilly, Artificialhybridization.
5. Explain Syngamy, Triple fusion and double fertilization
6. Give an account of endosperm development.
7. Explain apomixis and Polyembryony with significance.
8. List 7 pairs of contrasting characters selected by mendel.
9. Explain Law of segregation and independent assortment with anexample.
10. Briefly describe the following:
Incomplete dominance, pleotropy, multiple Allelism.
11. Give an account of semi-conservative DNA replication.
12. Give an account of process of Transcription in prokaryotes.
13. What are the post transcriptional modifications.
14. Define genetic code. What are its various features.
15. Explain the working of lac operon.
16. Explain Biofortification.
17. Write down various applications of plant tissue culture.
18. What are various steps of plant breeding.
19. Explain the role of microbes in industry, biogas, biocontrol.
20. Explain the following with examples-
Mutualism, predation, competition.
21. Explain population growth, decomposition, productivity,ecosystem services.
22. What are the various steps of Hydrarch succession.Q
23. Explain energy flow and ecological pyramids.
24. QWhat are the causes of biodiversity loss.
25. What are Biodiversity hotspots.
26. Explain latitudinal gradient of biodiversity and species arearelationship.
27. Differentiate between insitu and exsitu conservation.
28. Give an account of control of water pollution.
29. Explain solid waste management.
30. Explain green house effect,global warming and ozone depletion.
ZOOLOGY
Q1: Female Reproductive System with labelled diagram.
Q2: Spermatogenesis and oogenesis.
Q3: Menstrual Cycle.
Q4: Placenta and its function.
Q5: Birth Control Methods.
Q6: Infertility- ZIFT, GIFT, IUT etc.
Q7: Sex determination in Honey bees.
Q8: Genetic disorders like Sickle cell anemia, thalassemia, and hemophilia.
Q9: Downs syndrome, Klinefelter syndrome and Turner’s syndrome.
Q10: DNA fingerprinting / Human genome project.
Q11: Darwinism and Modern Synthetic theory.
Q12: Adaptive Radiations.
Q13: Filariasis, Amoebiasis, Immuno-globins, pneumonia and malaria.
Q14: Acquired Immunity.
Q15: Vaccination and Immunization.
Q16: Allergies, AIDS, Cancer.
Q17: Drugs and Alcohol Abuses.
Q18: Recombinant DNA Technology.
Q19: Application of Biotechnology in Medicine like Insulin, gene therapy.
Q20: BT Cotton.
