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Biology MCQS[NEET-2021 to 2022]-Reproduction in plants

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1. What is the theme of this year,s World Kidney Day?




2. Who has been selected for prestigious Kusumagraj national award for literature?




3. Who was conferred with the Param Vishisht Seva Medal, by President Ramnath Kovind for distinguished services?




4. Which team won the Bombay Gold Cup Hockey Team crown 2019?




5. Special Olympics World Games 2019 begins at which city?




6. Which company to launch digital innovation center ar Bucharest in Romania to develop software for clients based on cloud, big data, artificial intelligence, and machine learning?




7. Which bank has launched doorstep banking service for senior citizens over 70 years of age and differently-abled customers recently?




8. The arrangement of the nuclei in a normal embryo sac in the dicot plants is




9. Apomictic embryos in citrus arise from




10. Fibrous thickenings of hygroscopic nature are found in this part of the anther wall:




11. In a type of apomixis known as adventive embryony, embryos develop directly from the




12. In nature, cleistogamous flowers are




13. Which one of the following is surrounded by a callose wall?




14. What is the function of germ pore?




15. Which of the following pairs in angiosperms are diploid and triploid, respectively?




16. Which of the following statements about sporopollenin is false?




17. Which one of the following pairs of plant structures has haploid number of chromosomes?




18. Which one of the following statements is wrong?




19. In the fully organized polygonum type of embryo sac, what is the ratio of haploid, diploid and triploid nuclei?




20. Vernalisation stimulates flowering in




21. What is the ratio of equational divisions that take place in Cycas and angiosperms respectively leading to the formation of male gametes from pollen grains?




22. Ornithophily refers to the pollination by which of the following:




23. Ovule is attached to the placenta of ovary wall by:




24. Plants with ovaries having only one or a few ovules, are generally pollinated by




25. Sporopollenin is chemically




26. The pollen are liberated in Cassytha by:




27. There are 10 flowers in one individual plant of Crotalaria. In each microsporangium of every stamen of all the flowers, there are 30 microspore mother cells. How many pollen grains are formed from tha




28. Grafting is successful in dicots but not in monocots because the dicots have:




29. In which one pair both the plants can be vegetatively propagated by leaf pieces




30. An organic substance that can withstand environmental extremes and cannot be degraded by any enzyme is




31. The coconut water and the edible part of coconut are equivalent to




32. The gynoecium consists of many free pistils in flowers of




33. Both, autogamy and geitonogamy are prevented in




34. Even in absence of pollinating agents seed-setting is assured in




35. Wind pollinated flowers are




36. In anatropous ovule what is the direction of micropyle?




37. Which type of association is found in between entomophilous flower and pollinating agent?




38. Transfer of pollen grains from the anther to the stigma of another flower of the same plant is called




39. In which one of the following, male and female gametophytes do not have free living independent existence




40. When the other floral parts are arranged at the base of the gynoecium, the flower is called :




41. Male gametes in angiosperms are formed by the division of:




42. The aleurone layer in maize grain is specially rich in




43. Endosperm is formed during the double fertilization by:




44. In Angiosperms pollen tube liberate their male gametes into the:




45. Apomixis is a type of reproduction that results is the development of a/an




46. Wind pollination is common in




47. Double fertilization was first discovered by Nawaschin (1898) in




48. Egg apparatus consists of




49. What would be the number of chromosomes of the aleurone cells of a plant with 42 chromosomes in its roots tip cells?