Microsporogenesis results in the formation of microspores while megasporogenesis forms megaspores.<\/li>\n<\/ul>\nQuestion 2. \nArrange the following terms in the correct development sequence: Pollen grain, sporogenous, microspore tetrad, pollen mother cell, male gametes. \nAnswer: \nSporogenous tissue \u2019!Pollen mother cell\u2019!Microspore tetrad\u2019!Pollen grain\u2019!Male garnets.<\/p>\n
Question 3. \nWhat is meant by monosporic development of female gametophyte? \nAnswer: \nThe formation of female gametophyte or embryo sac from a single functional megaspore is called monosporic. The nucleus of functional megaspore undergoes 3 successive mitotic divisions to form haploid nuclei.<\/p>\n
Question 4. \nWith a neat diagram explain the 7-celled, 8-nucleate nature of the female gametophyte. \nAnswer: \nEmbryo sac is an oval multicellular structure which contains 8 nuclei but 7 cells. \n <\/p>\n
Question 5. \nWhat are chasmogamous flowers? Can cross\u00acpollination occur in cleistogamous flowers? Give reasons for your answer. \nAnswer: \nChasmogamous flowers have exposed anthers and stigma. Cross-pollination cannot occur in cleistogamous flowers, as such flowers do not open at all.<\/p>\n
Question 6. \nMention two strategies evolved to prevent self-pollination in flowers. \nAnswer: \nFlowering plants have developed many devices to discourage self-pollination and to encourage cross-pollination.<\/p>\n
Plus Two Botany Sexual Reproduction in Flowering Plants Multiple Choice Questions and Answers<\/h3>\n Question 1. \nApomictic embryos in Citrus arise from \n(a) synergids \n(b) maternalsporophytic tissue in ovule \n(c) antipodal cells \n(d) diploid egg \nAnswer: \n(b) maternalsporophytic tissue in ovule<\/p>\n
Question 2. \nWind pollinated flowers are \n(a) small, brightly coloured, producing large number of pollen grains \n(b) small, producing large number of dry pollen grains \n(c) large producing abundant nectar and pollen \n(d) small, producing nectar and dry pollen \nAnswer: \n(b) small, producing large number of dry pollen grains<\/p>\n
Question 3. \nWhich of the following statements about sporopollenin is false? \n(a) Exine is made up of sporopollenin \n(b) Sporopollenin is one of the resistant organic materials \n(c) Exine has apertures called germ pores where sporopollenin is present \n(d) sporopollenin can withstand high temperatures and strong acids \n(e) No enzyme that degradessporopollenin is so far known \nAnswer: \n(c) Exine has apertures called germ pores where sporopollenin is present<\/p>\n
Question 4. \nEgg apparatus of angiosperms consist of \n(a) one synergid and two egg cells \n(b) two synergid and one egg cells \n(c) one central cell, two synergid, and three antipodal cells \n(d) one egg cell, two polar nuclei, and three antipodal cells \nAnswer: \n(b) two synergid and one egg cells<\/p>\n
Question 5. \nIn some organisms, karyokinesis is not followed by cytokinesis as a result of which, multinucleate condition arises leading to the formation of syncytium. The perfect example for this is \n(a) appearance of a furrow in cell membrane \n(b) liquid endosperm in coconut \n(c) sexual reproduction \n(d) fertilization \nAnswer: \n(b) liquid endosperm in coconut<\/p>\n
Question 6. \nDuring the formation of embryo sac, the functional megaspore undergoes \n(a) two mitotic divisions \n(b) two meiotic division \n(c) three meiotic division \n(d) three mitotic divisions \nAnswer: \n(d) three mitotic divisions<\/p>\n
Question 7. \nOne advantage of cleistogamy is \n(a) it leads to greater genetic diversity \n(b) seed dispersal is more efficient and widespread \n(c) seed set is not dependent on pollinators \n(d) each visit of a pollinator results in transfer of hundreds of pollen grains \nAnswer: \n(c) seed set is not dependent on pollinators<\/p>\n
Question 8. \nWhich one of the following statements is not true? \n(a) Pollen grains are released from anthers at 2- celled state \n(b) Sporogenous cell directly behaves as he megaspore mother cell \n(c) Megaspore divides twice to form an eight nucleate embryo sac \n(d) Egg and synergids always lie near the micropylar end of ovule \nAnswer: \n(c) Megaspore divides twice to form an eight nucleate embryo sac<\/p>\n
Question 9. \nSporopollenin is chemically \n(a) homopolysaccharide \n(b) fatty substance \n(c) protein \n(d) heteropolysaccharide \nAnswer: \n(d) heteropolysaccharide<\/p>\n
Question 10. \nWhich one of the following pairs of plant structures has haploid number of chromosomes? \n(a) Megaspore mother cell and antipodal cells \n(b) Egg cell and antipodal cells \n(c) Nucellus and antipodal cells \n(d) Egg nucleus and secondary nucleus \nAnswer: \n(b) Egg cell and antipodal cells<\/p>\n
Question 11. \nWhat does the filiform apparatus do at the entrance into ovule? \n(a) It helps in the entry of pollen tube into a synergid \n(b) It prevents entry of more than one pollen tube into the embryo sac \n(c) It brings about opening of the pollen tube \n(d) It guides pollen tube from a synergid to egg \nAnswer: \n(a) It helps in the entry of pollen tube into a synergid<\/p>\n
Question 12. \nWhich of the following plant products is the hardest? \n(a) Lignin \n(b) Cutin \n(c) Suberin \n(d) Sporopollenin \nAnswer: \n(d) Sporopollenin<\/p>\n
Question 13. \nA typical angiosperm embryo sac at maturity, is \n(a) 4 – nucleate – 2 celled \n(b) 8 – nucleate – 7 celled \n(c) 4- nucleate – 4 celled \n(d) 8 – nucleate – 2 celled \nAnswer: \n(b) 8 – nucleate – 7 celled<\/p>\n
Question 14. \nWhy sometimes, even diploid offspring is produced through parthenogenesis? \n(a) When offspring is produced without fertilization of diploid egg cell \n(b) When offspring is produced through fertilization of diploid egg cell \n(c) When offspring is produced without fertilization of haploid egg cell \n(d) When offspring is produced through fertilization of haploid egg cell \nAnswer: \n(a) When offspring is produced without fertilization of diploid egg cell<\/p>\n
Question 15. \nPollen grains are stored for long period without losing its viability in \n(a) liquid nitrogen \n(b) liquidsulphur \n(c) liquidsulphur at-1960c \n(d) liquidsulphur at-196.50c \nAnswer: \n(a) liquid nitrogen<\/p>\n
Question 16. \nFiliform apparatus of an embryosac is located at \n(a) wall of embryosac \n(b) chalazal region \n(c) micropylar region \n(d) middle of polar nuclei \n(e) none of the above \nAnswer: \n(c) micropylar region<\/p>\n
Question 17. \nDouble fertilization is very common in \n(a) angiosperm \n(b) gymnosperm \n(c) pteridophytes \n(d) bryophytes \nAnswer: \n(a) angiosperm<\/p>\n
Question 18. \nIn Citms and mango the polyembryony is the special feature of occurance of \n(a) more than one embryo \n(b) more than one zygote \n(c) more than one embyosac \n(d) all the above \nAnswer: \n(d) all the above<\/p>\n
Question 19. \nTriple fusion takes place in angiosperm is due to \n(a) fusion of three polar nuclei \n(b) fusion of synergid and polar nuclei \n(c) fusion of three haploid nuclei \n(d) fusion of gametes \nAnswer: \n(c) fusion of three haploid nuclei<\/p>\n
Question 20. \nIn 40 percent of angiosperms, pollen grains are shed at \n(a) 2-celled \n(b) 3-celled \n(c) 4-celled \n(d) 5- celled \nAnswer: \n(b) 3-celled<\/p>\n
Question 21. \nIn artificial hybridization, bagging is done to \n(a) avoid wanted pollen \n(b) avoid unwanted pollen \n(c) prevent the entry of unwanted pollinators \n(d) allow the self-pollination \nAnswer: \n(b) avoid unwanted pollen<\/p>\n
Question 22. \nHow many mitotic divisions are required for the formation of mature embryosac \n(a) 4 \n(b) 3 \n(c) 5 \n(d) 2 \nAnswer: \n(b) 3<\/p>\n
Question 23. \nThe allergies and bronchial afflictions in some people often leading to chronic respiratory disorders. It is due to \n(a) pollen of parthenium \n(b) pollen of hibiscus \n(c) pollen of Acasia \n(d) both a and c \nAnswer: \n(d) both a and c<\/p>\n
We hope the Kerala Plus Two Botany Chapter Wise Questions and Answers Chapter\u00a02 Sexual Reproduction in Flowering Plants help you. If you have any query regarding\u00a0the Kerala Plus Two Botany Chapter Wise Questions and Answers Chapter 2 Sexual Reproduction in Flowering Plants, drop a comment below and we will get back to you at the earliest.<\/p>\n","protected":false},"excerpt":{"rendered":"
Plus Two Botany Chapter Wise Questions and Answers Chapter 2 Sexual Reproduction in Flowering Plants is part of Plus Two Botany Chapter Wise Questions and Answers Kerala. Here we have given Plus Two Botany Chapter Wise Questions and Answers Chapter 2 Sexual Reproduction in Flowering Plants. Board SCERT, Kerala Text Book NCERT Based Class Plus … Read more<\/a><\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":""},"categories":[42728],"tags":[48265],"yoast_head":"\nPlus Two Botany Chapter Wise Questions and Answers Chapter 2 Sexual Reproduction in Flowering Plants - A Plus Topper.com<\/title>\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n\t \n\t \n\t \n