Plant Reproduction: Pollination and Fertilization
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Questions and Answers

What happens after a pollen grain lands on the stigma of a suitable flower?

  • The stigma withers and falls off the flower.
  • The male gamete is released into the air.
  • A pollen tube grows from the stigma to the ovary. (correct)
  • The flower immediately produces seeds.

    • What is the role of the pollen tube in the process of fertilisation?

  • Generates heat to aid in the growth of the ovary.
  • Helps in photosynthesis to provide energy for seed formation.
  • Carries a male gamete to meet a female gamete in an ovule. (correct)
  • Protects the seeds from external damage.

    • What is the outcome of fertilisation in terms of chromosomes?

  • Each gamete retains its own set of chromosomes.
  • The two gametes join and their chromosomes combine. (correct)
  • The male gamete destroys the female gamete's chromosomes.
  • The chromosomes of the two gametes remain separate.

    • What does the fertilised ovule develop into?

    <p>A seed containing a food store and an embryo.</p> Signup and view all the answers

    How does the ovary of a flower contribute to seed development?

    <p>Develops into a fruit to protect the seed.</p> Signup and view all the answers

    The pollen grain on the stigma grows a tiny ______, all the way down the style to the ovary.

    <p>tube</p> Signup and view all the answers

    In a process called fertilisation, the male gamete meets the female gamete in an ______.

    <p>ovule</p> Signup and view all the answers

    The fertilised ovule goes on to form a ______, which contains a food store and an embryo.

    <p>seed</p> Signup and view all the answers

    The ovary of a flower develops into a ______ to protect the seed.

    <p>fruit</p> Signup and view all the answers

    Some flowers, such as avocados, only have one ______ in their ovary.

    <p>ovule</p> Signup and view all the answers

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