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#1. Identify the asexual reproductive structure ‘M’ in the following diagram
#2. Pollen grain develops from ____ of anther.
#3. The exine of pollen grain is made up of
#4. The number of synergids and antipodals present in a typical angiosperm embryo sac at maturity respectively are
#5. In angiosperms, megaspores formed after meiosis of megaspore mother cell are arranged in _____
#6. Environmental biotic factor that helps in pollination is
#7. Regeneration as a method of asexual reproduction is observed in.
#8. Which one of the following generates new genetic combinations leading to variation?
#9. “Testes are extra-abdominal in position”. Which of the following is most appropriate reason?
#10. Oogonia arise from the endoderm of the ____
#11. Which of the following cells during gametogenesis is normally diploid?
#12. During entry into the ovum, acrosome of sperm releases
#13. How many pairs of contrasting characters in pea plants were studied by Mendel in his experiments?
#14. During a dihybrid cross with contrasting characters in the F2 generation parental genotypes will appear in _____ ratio.
#15. In a dihybrid cross with contrasting characters, the number of different genotypes obtained in F2 generation are_____.
#16. When two homozygous plants with red and white flowers are crossed, their offsprings show pink flowers. This indicates that the alleles of the gene for flower colour shows _____.
#17. Transformation was discovered by
#18. A typical nucleosome “bead” is made up of
#19. Polymerization of DNA nucleotides during the synthesis of lagging strand occurs in
#20. If E coli is allowed to grow for 40 minutes in a medium containing N15, then the number of N14. N14 containing DNA would be
#21. The most common chemical compounds formed in Urey-Miller’s experiment were
#22. When members of a population attain sexual maturity at different times preventing inter-breeding, it is termed as ______ isolation.
#23. Arrange the following in the pathway of water movement in the root. i. Cortex ii. Epidermis iii. Pericycle iv. Endodermis The correct answer is
#24. Continuous upward flow of water stream in tall trees is maintained due to____.
#25. Dr. F. Went noted that if coleoptile tips were removed and placed on agar for one hour, the agar world produce a bending when placed on one side of freshly cut coleoptile stumps. Of what significance is this experiment?
#26. If a plant produces flowers when exposed only to alternating periods of 5 hours light and 3 hours dark in a 24-hour cycle, then the plant should be a____.
#27. The structure which prevents the entry of food into respiratory tract is
#28. The volume of air inspired or expired by a healthy man per minute is
#29. Name the pulmonary disease in which alveolar surface area involved in gas exchange is drastically reduced due to damage in the alveolar walls
#30. The heart is covered by
#31. Visual information is decoded by
#32. Which one of the following is NOT a refractive medium of the eye?
#33. Which is the inhibitory hormone of GH?
#34. Which one of the following secretes glucagon?
#35. Introduction of attenuated pathogens in human body results in ______.
#36. AB blood group was discovered by
#37. Which one of the following disease is caused by bacteria?
#38. The pH of nutrient medium in plant tissue culture is adjusted between
#39. The breeding technique that is useful to expose harmful recessive genes is
#40. H. Boyer and S. Cohen are famous for their research work on
#41. DNA polymerase enzyme is isolated from which bacteria?
#42. Tissue Plasminogen Activator (TPA) is used to
#43. Genetically engineered bacteria can accelerate the _____.
#44. Which vector can clone only a small fragment of DNA?
#45. Cystic fibrosis can be treated by ____ in gene therapy
#46. In an ecosystem each organism occupies a particular place and has a functional role it is known as
#47. World Ozone Day is celebrated on
#48. The term ecosystem was coined by
#49. Of the total incident solar radiation, the percentage Photosynthetically Active Radiation (PAR) captured by plants
#50. How many hot spots of biodiversity in the world have been identified till date by Norman Myers?
