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Make a list of any three outbreeding dev...

Make a list of any three outbreeding devices that flowering plants have developed and explain how they halp to encourage cross-pollination.

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An Angiosperm anthor is called dithecous since theca surround its lobes.
Structure of Microsporangium : In a transverse section a microsporangium appears fairly circular in ouline. It is surrounded by 4 wall layers.
(a) Epidermis.
(b) Endothecium (c ) Middle layers
(d) Tapetum.
The outer three layers of provide protection and Tapetum nourishes the developing pollen grains. The centre of a microsporangium is occupied by sporogenous tissue.
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Make a list of an y three outbreeding devices that flowering plants have developed and explain how they help to encourage cross-pollination

Explain any two out breeding devices that flowering plants have developed to encourage cross pollination

Knowledge Check

  • Flowering plants have developed many devices to discourage self - pollination and to encourage cross - pollination except

    A
    Dicliny
    B
    Dichogamy
    C
    Homogamy
    D
    Self Incompatibility

  • Assertion : Flowering plants have developed many out breeding devices to discourage self-pollination and to encourage cross-pollination. Reason : Continued self-pollination result in ibreeding depression.

    A
    If both assertion and reason are true and the reason is the correct explanation of the assertion.
    B
    If both assertion and reason are true but reason is not the correct explanation of the assertion.
    C
    If assertion is true but reason is false
    D
    If both assertion and reason are false.

  • Flowering plants have evolved outbreeding devices because

    A
    Cross pollination provides greater chances of double fertilization
    B
    Larger number of pollinators are available transfer of pollen
    C
    Pollen production is very high resulting in higher seed production
    D
    Continued self-pollination results in inbreeding depression

    • Similar Questions

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    Continued self pollination lead to inbreeding depression. List three devices, which flowering plant have developed to discourages self pollination ?

    (a) State one difference and one similarity between geitonogamy and xenogamy. (b) Explain any three devices developed in flowering plants to discourage self pollination and encourage cross pollination.

    How have the modern towns developed in India ? Explain.

    Explain any two contrivances or outbreeding devices for pollination.

    Geitonogamous flowering plants are genetically autogamous but functionally cross-pollinated. Justify.

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