Page 1 :
NOTES CLASS VII SCIENCE, CHAPTER 12: REPRODUCTION IN PLANTS, , 1. (a) vegetative propagation, (b) unisexual, (c) Pollination, (d) fertilization, (e) wind, water, animals, , 2. Asexual modes of reproduction are as follows:, (i) Vegetative propagation: A plant can produce new plants from, vegetative parts of the plant like roots, stems., For example, ginger., , (ii) Budding: It involves the formation of a new individual from a bulb-like, projection called a bud., For example, yeast., , (iii) Fragmentation: New organisms are forms from the fragment of the, parent body., For example, algae., , (iv) Spore formation: Plant reproduce by the formation of spores., For example, fungi., , 3. Sexual reproduction is a method where male and female gametes fuse to, form a new individual. In plants, stamens and pistils are male and female, reproductive organs which bear anthers and ovary respectively., , 4. Difference between asexual and sexual reproduction are:, , , , Asexual reproduction, , Sexual reproduction, , , , (i) It requires only one parent., , Requires male and female parents., , , , (ii) Daughter cells formed are, identical to parent and to, each other., , Newly formed offspring show, variations in comparision to the, parents., , , , (iii) Special reproductive organs, are not required., , , , , , Special reproductive organs are, required., , , , i, , anther, Filament, , (a) Stamen, , , , Stigma, , , , Style, , (b) Pistil, , 6. Differences between self-pollination and cross-pollination are:, , , , Self-pollination, , Cross-pollination, , , , (i) It involves the transfer of pollen, from the stamen to the pistil of, the same flower., , It involves the transfer of pollen, from the stamen of one flower to, the pistil of another flower., , , , (ii) It occurs only in bi-sexual, flowers., , , , , , It occurs in unisexual and bisexual, flowers., , , , , , , , 7. The process of fusion of male and female gametes to form a zygote is, called fertilization. The zygote develops into an embryo and the embryo, undergoes cell division to form seeds., , 8. (Omit)
