sexual

Cards (10)

  • The reproductive organs of flowering plants (angiosperms) are contained in the flowers
    • Fertilisation is the process of the sperm fusing with the egg to produce a zygote (fertilised egg).
  • They need to rely on external agents to carry the gametes (pollinating agents) and disperse their seeds
    • The female reproductive organ is the called carpel and consists of the ovary, style and stigma
    • The male reproductive organ consists of an anther and a filament 
    • For fertilisation to occur, the male gametes inside pollen must be carried from the anthers to the stigma. The process of transferring gametes is called pollination.
    • Agents such as wind, water, and animals carry pollen from the anthers of one flower to the stigma of another flower, either on another plant (cross-pollination) or on the same plant (self-pollination).
    • Once pollen has been deposited in the stigma, a pollen tube grows down the style, carrying inside it the male gamete (sperm cell) to an ovule contained in the ovary where fertilisation occurs. 
    • The fertilised ovule develops, protected within the ovary. The ovule containing an embryo is now termed a seed and the surrounding ovary grows to become a fruit
    • Agents such as wind, water and animals disperse the seeds over wide distances. The seeds will lie dormant until favourable conditions initiate germination