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Name the parts a, b, c and d....


Name the parts a, b, c and d.

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(a) Pollen grains from species A could germinate in the stigma extract of its own species. They have very good percentage of germinating pollen (95%) showing its fertility. Pollen of species A is incompatible with species B and fails to germinate.
(b) Pollen from species B is sterile and fails to germinate in both extracts.
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ICSE-SEXUAL REPRODUCTION IN FLOWERING PLANTS -COMPETITION CORNER ( OBJECTIVE TYPE QUESTIONS (ASSERTION AND REASON TYPE QUESTIONS ( FOR AIIMS ASPIRANTS )))
  1. Name the parts a, b, c and d.

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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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