(a) Identify A, B and C in the given diagram and write their functions.
(b) Mention the role of gamete and zygote in sexually reproducing organisms.
(a) A—> Stigma, B —> Pollen tube, C —» Female Functions: Stigma: It receives pollen.
(b)Pollen tube: It transfers the male gamete. Female gamete: After fertilization, forms zygote which develops into a new gamete individual. (b) Gamete is a haploid cell which fuses to form diploid zygote.
After fertilization, the zygote divides several times to form an embryo within the ovule. The ovule develops a tough coat and is gradually converted into a seed.