Reproduction in Plants Class 7 Science Notes - Chapter 12

All living organisms reproduce to multiply. The reproductive part of a plant is flower. It is either unisexual or bisexual. When a flower has only female reproductive parts or male reproductive parts, it is said to be a unisexual flower. When a flower has both reproductive parts i.e male and female together, it is called a bisexual flower. The female gametes are present inside the ovule whereas the male gametes inside the pollen grains. Sexual reproduction and asexual reproduction are the modes of reproduction in plants. The asexual methods are fragmentation, vegetative propagation, budding, and spore formation.

  • Sexual reproduction – Involves the fusion of female and male gametes.
  • Vegetative propagation – Through this process, a new plant can be produced from dissimilar vegetative parts like stems, roots, and leaves.

When there is a transfer of pollen grain from the anther of a flower to the stigma of another flower or the same flower, it is called pollination. Two types of pollination are as follows –

  • Cross-pollination – Here the transfer of pollen grain happens from the anther of a flower to the stigma of another flower
  • Self-pollination – Here the transfer of pollen grain happens from the anther of a flower to the stigma of the same flower

Few Important Questions

  1. What is asexual reproduction? Explain the different methods.
  2. Draw and label reproductive parts of the flower.
  3. Explain the different ways in which seeds are dispersed.
  4. Choose the right answer for the following questions-
  5. What does a mature ovary form?

    • (a)Pistal (b) Stamen (c) Seed (d) Fruit

    Name the reproductive part of the plant?

    • (a)Root (b) Leaf (c) Stem (d) Flower
  1. Fill in the blanks-
    1. A flower with either female or male reproductive part is termed as __________.
    2. Reproduction in Bryophyllum occurs through ___________.
  1. Distinguish between sexual and asexual reproduction.
  2. Distinguish between cross-pollination and self-pollination.
  3. Explain sexual reproduction in plants.

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