The outer wall or exine of pollen grains contains sporopollenin. It is one of the most resistant organic compounds known. It protects pollen... View Article
Xenogamy refers to the pollination of pollen grains from the anther of one flower to the stigma of another flower of another plant. Papaya shows... View Article
Chasmogamous flowers have their anthers and stigma exposed, whereas cleistogamous flowers are closed and do not open at all. E.g. Oxalis, Viola... View Article
Cleistogamous flowers do not open at all. Anthers and stigma are in close contact and pollination occurs when pollen grains come in contact with... View Article
Geitonogamy and xenogamy are types of cross-pollination (allogamy). When pollen grains are transferred to the stigma of the other flower of the... View Article
Autogamy refers to the self-pollination between the anther and stigma of the same flower, whereas allogamy refers to cross-pollination. In... View Article
Complete autogamy is rare when anther and stigma are exposed, e.g. in chasmogamous flowers. For autogamy to occur, stigma and anther should be in... View Article
Autogamy is a type of self-pollination wherein pollination between anther and stigma of the same flower takes place. Complete autogamy is rare as... View Article
Bagging refers to the covering of stigma from a bag to prevent contamination of the stigma with undesirable pollen grains. It is done to induce... View Article
Yes, apomictic seeds produce identical progeny. Apomixis is a kind of asexual reproduction, where seeds are produced without fertilisation. There... View Article
Emasculation is the removal of anthers from a bisexual flower. It is done to prevent self-pollination and cross-pollinate plants to combine... View Article
Both, vegetative reproduction and apomixis are asexual methods of reproduction and produce identical progeny to the parent plant. Also Check:... View Article
Amphimixis refers to sexual reproduction, where the fusion of two gametes takes place. Apomixis is asexual reproduction, which occurs without... View Article
Apomictic seeds are produced without fertilisation. Hybrid crop cultivation produces more yield and crops with desirable traits. Hybrid seeds... View Article
Apomixis is the formation of seeds without fertilisation. Apomixis is commercially used to produce seed in hybrid plants so that they need not be... View Article
Human gametes are haploid as they are formed by meiosis during gametogenesis. Haploid gametes ensure that after fusion of male and female... View Article
Synergids are produced by the mitotic division in the haploid megaspore of a diploid plant. So synergids of a diploid plant are haploid. Also... View Article
The ovule is the megasporangium in the flowering plants. It contains an embryo sac, which is formed from the functional megaspore. The ovule is... View Article
Cotyledon is referred to as the embryonic leaf. It is present in seeds and stores food reserves. Angiosperms are divided into monocotyledons and... View Article