Reference no: EM131561184
1. Give two practical significance of vegetative propagation.
2. In whiptail lizards, only females are born generation after generation. There are no males. How is this possible?
3. Fruits are formed only in angiosperms. Give reason.
4. Foetus is considered a parasite on mother. Explain.
5. What was the gas mixture used by Miller in his experiment?
6. Skin is called a self-disinfecting organ. Why?
7. Why does a dish washing powder contain enzymes amylase and lipase?
8. Mention two causes of cultural eutrophication.
9. Why are menstrual cycles absent during pregnancy?
10. A. how many spermatozoa are formed from one secondary spermatocyte?
B. where does the first cleavage division of zygote take place?
11. what is the cross between the progeny of F1 and the homozygous recessive parent called? How is it useful?
OR
Even if a character shows multiple allelism an individual will only have two alleles in that character. Why?
12.Give reasons, why RNA viruses are most mutable and evolve faster than other viruses.
13.What is DNA polymorphism? Why is it important to study it?
14. Can gamma rays used for crop improvement programmes prove to be harmful for health? Discuss.
15. give the scientific names of the microbes responsible for the production of cyclosporine A and statins.
16. would you choose an exonuclease while producing a recombinant DNA molecule? Why?
17. give any two reasons why the patent on basmati should not have gone to American company?
18. why is the term ‘cycle' used for movement of mater while "flow" for energy?
19. Draw a labeled diagram of the longitudinal section of the maize grain to show the structure of mature embryo. OR
Trace the development of a mature ovule from a megaspore mother cell.
20. Test tube baby is born to a woman who cannot conceive normally. Explain the procedure involved.
21. Who performed the ‘blender experiment' with respect to DNA? What was the objective of this experiment? Explain the procedure in detail.
22. A plant with red flowers was crossed with another plant with yellow flowers. If F1 showed all flowers orange in colour, explain the inheritance?
23. Name the following:
a. Name the microbe responsible for the production of clot buster enzyme?
b. name the microbe responsible for citric acid production?
c. what is the commercial product produced by Trichodermapolysporum?
d. give the bacterium name known for production of butyric acid?
e. name the fungus responsible for production of statins? Also the medical application of statin.
24. Illustrate the design of a bioreactor and explain the uses of each part.
25. What does pBR322 signifies? Draw a labeled diagram of the same.
26. Describe phosphorus cycle in nature.
27. The relation between species richness and area for a wide variety of taxa turns out to be a rectangular hyperbola. Give a brief explanation.
28. You are a botanist working in the area of plant breeding. Describe the various steps that you will undertake to release of a new variety.
OR
What are the advantages of tissue culture methods over conventional method of plant breeding in crop improvement programmes?
29. Explain the role of regulatory gene in the concept of operon.
OR
Where do transcription and translation occur inside living cell? Briefly describe the thre steps involved in the process of translation.
30. Give the differences between mutualism and commensalism. What are the values attained by each one of them.