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CBSE Class 10 Science, Important Questions, Chapter 8, How do Organisms Reproduce, , 1 Marks Questions, 1. In vegetative reproduction, the new individuals are genetically –, a) Similar, b) Dissimilar, c) Abnormal, d) None of these, Ans. a) Similar, , 2. When an organism breaks into a number of parts and each part develop into an, individual, it is called –, a) Budding, b) Binary fission, c) Regeneration, d) Spore formation, Ans. c) Regeneration, , 3. In man, fertilization of ovum takes place in, a) Vagina, b) ovary, , Material downloaded from myCBSEguide.com., , 1/8
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c) uterus, d) Fallopian tubes, Ans. d) Fallopian tubes, , 4. Define parthenogenesis., Ans. Development of organism from an unfertilized egg., , 5. How may male gametes are produced by pollen grains?, Ans. Two, , 6. During grafting, the portion of plant that is grafted is called –, a) Stock, b) Scion, c) stalk, d) stem, Ans. b) Scion, , 7. Which part of the flower forms the fruit?, a) Whole flower, b) Only stamens and carpel, c) Only ovary, d) Only carpel, Ans. c) Only ovary, , Material downloaded from myCBSEguide.com., , 2/8
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8. Anemophily is the pollination by –, a) Birds, b) Rain, c) insects, d) Wind, Ans. d) Wind, , 9. What is syngamy?, Ans. Fusion of male gamete with the egg cell is called syngamy., , 10. Name the structure through which pollen tubes enters the ovule., Ans. Stigma, , 11. A common feature of reproduction in Amoeba, spirogyra and yeast is that –, a) Asexual reproduction occurs after sexual reproduction, b) Asexual reproduction occurs before sexual reproduction, c) Asexual reproduction does not involve gametes, d) Asexual reproduction involves only one parent, Ans. (d) Asexual reproduction involves only one parent., , 12. The normal duration of menstrual cycle is, a) 7 – 8 days, b) 13 – 15 days, c) 3 – 4 days, Material downloaded from myCBSEguide.com., , 3/8
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d) 28 days, Ans. d) 28 days, , 13. Which of the following is an IUCD?, a) copper – T, b) diaphragm, c) oral pills, d) tubectomy, Ans. a) copper – T, , 14. What is parturition?, Ans. Parturition – The birth of fully developed foetus in completion of gestation., , 15. What is puberty?, Ans. Puberty – Age when reproductive system functionally active or starts producing ova or, sperm is called puberty., , 16. Fertilization in plants occurs in the –, a) Embryo sac, b) Style, c) Pollen tube, d) Stigma, Ans. a) Embryo sac, , 17. Characters that are transmitted from parents to offspring during reproduction, Material downloaded from myCBSEguide.com., , 4/8
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show, a) only similarities with parents, b) only variations with parents, c) neither similarities nor variations, d) both similarities and variations with parents, Ans. d) both similarities and variations with parents, , 18. Which among the following diseases is not sexually transmitted?, a) syphilis, b) Gonorrhoea, c) HIV – AIDS, d) Hepatitis, Ans. d) Hepatitis, , 19. What is tubectomy?, Ans. Removal of a section of fallopian tube., , 20. Name the causative organism, of AIDS?, Ans. HIV – Human Immunodeficiency virus., , 21. A common feature of reproduction in Amoeba, spirogyra and yeast is that –, a) They reproduce only sexually, b) They are all unicellular, c) they reproduce asexually, Material downloaded from myCBSEguide.com., , 5/8
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d) They are all multicellular, Ans. They reproduce asexually, , 22. Which of this is seminal fluid?, a) Prostate gland, b) Cowper’s gland, c) Seminal vesicle, d) all of these, Ans. c) Seminal vesicle, , 23. At the time of entering into ovule, pollen tube has, a) three male nuclei, b) two mole nuclei, c) one gamete nucleus, d) four male gametes, Ans. Two male nuclei, , 24. How many follicles mature every month during the reproductive phase of human, female?, Ans. One egg is produced every month by one of the ovaries, , 25. What is the product of fertilization?, Ans. Zygote, , 26. Asexual reproduction takes place through budding in, Material downloaded from myCBSEguide.com., , 6/8
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(a) Amoeba, (b) Yeast, (c) Plasmodium, (d) Leishmania., Ans. (b) Yeast, , 27. Which of the following is not a part of female reproductive system in human beings?, (a) Ovary, (b) Uterus, (c) Vas deferens, (d) Fallopian tube, Ans. (c) Vas deferens, , 28. The anther contains, (a) Sepals, (b) Ovules, (c) Carpel, (d) Pollen grains., Ans. (d) Pollen grains., , 29. The simple animals such as planaria can be cut into number of pieces and each, piece grows into a complex organism. What is this process known as?, Ans. Regeneration, , Material downloaded from myCBSEguide.com., , 7/8
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30. Name the unicellular organism which caused the disease known as kala-azar., Ans. Leishmania, , 31. Which process taking place in the nucleus of a cell leads to variation in the offspring, during reproduction?, Ans. DNA copying, , 32. Which type of layering is done in Jasmine?, Ans. Air Layering (Gootee), , 33. Where does fertilization takes place in human female?, Ans. Oviduct (fallopian tube), , Material downloaded from myCBSEguide.com., , 8/8
