Biology - Reproduction in Plants (Sexual and Asexual, Pollination, Fertilization)

Asexual Reproduction: A mode of reproduction where a single parent produces offspring without the fusion of gametes. Methods include Binary Fission, Budding (e.g., $Yeast$), Fragmentation (e.g., $Spirogyra$), and Spore Formation (e.g., $Rhizopus$).

Vegetative Propagation: A form of asexual reproduction where new plants are produced from vegetative parts like roots, stems, or leaves. Natural examples include tubers in $Solanum \ tuberosum$ (Potato) and leaf buds in $Bryophyllum$.

Artificial Vegetative Propagation: Techniques used by humans to grow plants, including Cutting, Layering, Grafting, and Tissue Culture ($Micropropagation$).

Structure of a Flower: The reproductive organ of an angiosperm. It consists of the Calyx (sepals), Corolla (petals), Androecium (stamens - male part), and Gynoecium (pistil/carpel - female part).

Pollination: The transfer of pollen grains from the anther to the stigma. It is classified into Self-pollination ($Autogamy$) and Cross-pollination ($Allogamy$), mediated by agents like wind ($Anemophily$), water ($Hydrophily$), or insects ($Entomophily$).

Fertilization: The process involving the germination of the pollen grain on the stigma, the growth of a pollen tube through the style, and the fusion of the male gamete with the female gamete (egg cell) inside the ovule.

Post-Fertilization Changes: After fertilization, the zygote develops into an embryo, the ovule transforms into a seed, and the ovary ripens into a fruit.