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Plant Reproduction

Plant Reproduction. 15-3-12. Reproduction is the formation of new Individuals. Sexual reproduction involves two sex cells joining together. A gamete is a sex cell . PLANT REPRODUCTION. Asexual reproduction means that new individuals are formed from only one parent .

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Plant Reproduction

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  1. Plant Reproduction 15-3-12

  2. Reproduction is the formation of new Individuals. Sexual reproduction involves two sex cells joining together. A gamete is a sex cell. PLANT REPRODUCTION

  3. Asexual reproduction means that new individuals are formed from only one parent. Strawberries produce runners which allow them to reproduce asexually. PLANT REPRODUCTION

  4. Sexual reproduction in plants involves: Pollination Fertilisation Seed and fruit formation Seed and fruit dispersal Germination PLANT REPRODUCTION

  5. The functions of the parts of a flower are: Sepals protect the flower when it is a bud. Petals protect the reproductive parts and may attract insects. Carpels produce egg cells which contain the female gametes. Stemens produce pollen grains which contain the male gametes. Structure of a flower

  6. (H/L) A carpel consists of: A stigma for pollen grains to land on A style which connects the stigma to the ovary An ovary which contains one or more ovules (each ovule contains an egg cell). PLANT REPRODUCTION

  7. (H/L) A stamen consists of: A filament which supports the anther An anther which produces pollen. CHAPTER 14PLANT REPRODUCTION

  8. Pollination is the transfer of pollen from a stamen to a carpel. The two methods of pollination are wind and insect pollination. Pollination

  9. Flowers are adapted for a particular type of pollination in the following ways: Wind pollination: small, green petals with no nectar or scent; large amounts of pollen; stamens and carpels are mostly outside the petals. Pollination

  10. Insect pollination: Large, brightly coloured petals with nectar and a scent; smaller amounts of pollen; stamens and carpels are mostly inside the petals. Pollination

  11. Fertilisation is the joining of the male and female gametes to form a zygote. A pollen tube allows the male gamete to pass down to the female gamete in the carpel. Fertilisation

  12. After fertilisation the ovule forms a seed. A seed consists of: a plumule which will form the shoot of the adult plant a radicle which will form the roots of the adult plant (the plumule and radicle form the young plant or embryo) a food supply around the embryo a seed coat called the testa. The ovary forms the fruit, which may have one or more seeds Structure of a seed

  13. Dispersal is the carrying of the seed or fruit as far as possible from the parent plant. Seed dispersal reduces competition between seedings and the parent plant. Seed dispersal

  14. The main methods of dispersal are: Wind - Animal Self - Water Seed dispersal

  15. Germination is the growth of a seed to form a new plant. The conditions necessary for germination are: Water Oxygen a suitable temperature, ie. warmth. Germination

  16. To investigate the conditions necessary for germination, place seeds in four tubes so that: Tube A has water, oxygen and a suitable temperature (germination takes place) Tube B has no water (no germination) Tube C has no oxygen (no germination) Tube D is in a low temperature (no germination) Experiment

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