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7. (a) Arrange the sentences (in terms of P, Q, R, S) given below in order to describe the process of fertilization. P: The zygote divides inside the ovule to form the embryo. Q: The pollen grains germinate when they fall on the stigma of a flower of the same species R: The male and female gametes fuse to form a zygote. S: A pollen tube is produced that reaches the ovule. (b) What is the name of the process in which - : (i) the pollen grains is transferred from anther to stigma of a flower? (ii) the male gamete fuses with female gamete? |
| Answer» 7(a). Q→S→T→P→R→(b). (i) Pollination :-Pollination is the ACT of transferring pollen grains from the male anther of a flower to the female stigma. The goal of every living organism, including plants, is to create offspring for the next generation.(ii) The process of fusion of a male gamete (or sperms) with a female gamete(ovum) is called FERTILIZATION. The two haploid nuclei each from either parent fuses to form a DIPLOID zygote which is universal in all sexually reproducing organisms.Explanation:Hope it HELPS you. | |