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Define: Siphonogamy...

Define: Siphonogamy

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In flowering plants, male pronuclei pass through pollen tube to reach the egg cell for fertilisation, it is called siphonogamy.
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Siphonogamy is

Define geitonogamy.

Study the given statements about gymnosperrms and select the correct option. (i). Mode of fertilisation is siphonogamy (ii). Male and female cones are borne on same tree in pinus. (iii). Endosperm represents female gametophyte.

Select the correct statements from the following I. Endosperm is generally triploid in angiosperms, II. All angiosperms have monosporic and endosporic embryo sac, III. Angiosperms are characterised by double fertilization, IV. All angisoperms show indirect pollination and siphonogamy

$ Fertilization with the help of a pollen tube is called Siphonogamy. ! Entry of pollen tube into the ovule through integuments is called Mesogamy.

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ICSE-SEXUAL REPRODUCTION IN FLOWERING PLANTS -COMPETITION CORNER ( OBJECTIVE TYPE QUESTIONS (ASSERTION AND REASON TYPE QUESTIONS ( FOR AIIMS ASPIRANTS )))
  1. Define: Siphonogamy

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  2. Assertion: Endosperm of angiosperms is generally triploid (3n). Re...

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  3. [A] : Dispersal of fruits in Xanthium takes place by wind and water. ...

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  4. Assertion: Fruits are formed only in angiosperms. Reason: Fruits de...

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  5. Assertion: Seed plants are highly evolved. Reason: Seeds are found ...

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  6. [A] : In Apomixis , plants of new genetic sequence are produced . [R...

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  7. Assertion: Ovule is ategmic in Santalum. Reason: Ovule without inte...

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  8. Assertion: Dichogamy refers to maturation of male and female sex organ...

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  9. Assertion: Some fruits are seedless or contain empty or nonviable seed...

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  10. Assertion: The fruits of groundnut are not nuts but underground pods. ...

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  11. Assertion: Entomophilous plants produce less pollen when compared to a...

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  12. [A] : The time involved between pollination and fertilization varies f...

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  13. Assertion: Cross-pollination results in healthy and stronger offspring...

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  14. Assertion: Red colour of flowers attracts butterflies and wasps, but n...

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  15. Assertion: A flower is modified shoot. Reason: All the floral parts...

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  16. Assertion: Continued self-pollination generation after generation resu...

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  17. Assertion: Insects visit flowers to gather honey. Reason: Attractio...

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