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www.eenadupratibha.net Junior Inter Botany t e 2 Marks Questions 1. n . a Name a plant that has single fruit developing from the entire inflorescence. What is such a fruit called? h b i A: Pine apple / Jack fruit (any one) ★ Composite fruit 2. t a r What is the type of fruit found in mango? How does it differ from that of coconut? p u d A: Drupe. ★ The mesocarp in mango is fleshy, juicy and edible whereas the mesocarp in coconut is fibrous. 3. a n e e . w w What is meant by pulvinous leaf base? In members of which angiospermic family do you find them? t e n A: Swollen leaf base which stores water is called pulvinous leaf base. It is found in the family Leguminosae. w 4. . a h Define vivipary with an example. b i t A: The germination of seed while still attached to the mother plant is called vivipary. a r p e.g.: Rhizophora (Mangrove). 5. What is meant by heterospory? Mention the two types of spores developed in an angiospermic plant. u d a A: Production of two types of spores from a plant is termed as heterospory. The two types of spores developed in angiosperms are microspores and megaspores. 6. n e e . ww Name the parts of pistil which develop into fruit and seeds. A: Ovary develops in a fruit. w Ovules develop into seeds. 7. What are the three cells found in the pollen grain when it is shed at the three celled stage? A: One vegetative cell and two male gametes. R-27-12-14 www.eenadupratibha.net www.eenadupratibha.net 8. Name the parts of an angiosperm flower in which development of male and female gametophyte take place. A: Male gametophyte develops in androecium (pollen grains-microspore). t e ★ Female gametophyte develops in gynoecium (nucellus of ovule-megaspore). 9. n . a Mention two strategies evolved to prevent self-pollination in flowers. h b i A: Dichogamy, herkogamy, heterostyly, dicliny and self-sterility (any two). 10. What is meant by scutellum? In which type of seeds is it present? t a r A: The single cotyledon present towards lateral side of the embryonal axis in a monocot seed is called scutellum. It is found in the seeds of grass family (monocot seeds). p u d 11. What is Natural system of plant classification? Name the scientists who followed it. a n e e . w w A: The system of plant classification which is based on all important morphological characters is called Natural system of plant classification. Bentham and Hooker. t e n 12. What is geocarpy? Name the plant which exhibits this phenomenon. w A: The fruit which develops inside the soil is called geocarpy. Arachis hypogea. . a h 4 Marks Questions b i t 13. List the changes observed in angiosperm flower subsequent to pollination and fertilisation. a r p A: An angiosperm flower shows the following changes after pollination and fertilization: u d a ★ Zygote develops into an embryo by cell division and differentiation. ★ The ovules develop into seeds. n e e . ww ★ The ovary develops into a fruit. ★ The sepals, petals and stamens of the flower wither and fall off. 14. Distinguish between asexual and sexual reproduction. Why vegetative reproduction is also considered as a type of asexual reproduction? w www.eenadupratibha.net www.eenadupratibha.net A: Sexual reproduction Asexual reproduction ★ Generally the offsprings are ★ One or two parents may be involved in production of produced by a single parent. offsprings. ★ There is no fusion of gametes or ★ Fusion of gametes (fertilization) takes place. fertilization. ★ It occurs in single celled or ★ It occurs in relatively complex organisms. relatively simple organisms. ★ It is a simple process like binary ★ It is an elaborate and slow process. fission and budding. ★ The offsprings are identical to ★ The offsprings are not identical to the parents or among the parent. themselves. (Note: Write at least three differences) ★ As vegetative reproduction also does not involve formation of gametes and fertilization it is also considered as a type of asexual reproduction. t e n 15. Discuss the various types of pollen tube entry into ovary with the help of diagrams. . a h A: The pollen tube travels through the style and enters the ovary. Different types of pollen tube entry into the ovary are: b i t Porogamy: The pollen tube enters the ovary through the micropyle. a r p Chalazogamy: The pollen tube enters the ovary through the chalaza. u d a Mesogamy: The pollen tube enters the ovary through the integuments. w n e e . ww pollen tube pollen pollen tube tube A-Porogamy B-Chalazogamy C-Mesogamy www.eenadupratibha.net www.eenadupratibha.net 16. Give economic importance of plants belonging to Fabaceae. A. Economic importance of plants belonging to Fabaceae: Plants like red gram and black gram are used as pulses (good source of protein). Soyabean and ground nut yield oil. t e n . a ★ Pods of beans, seeds of peas, leaves of Methi are used as vegetables and green leaves. h b i ★ Timber is obtained from Indian rose wood (red sanders). ★ Blue dye is obtained from Indigofera tinctoria and yellow dye from Butea monosperma. t a r ★ Derris or Pongamia is used in medicines. p u d ★ Phaseolus and other species are used as fodder. Sesbania and Tephrosia are used as green manure. a n Writer: P. Uma Amareswari e e . w w t e n w . a h b i t a r p u d a n e e . ww w www.eenadupratibha.net