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From among the situations given below, c...

From among the situations given below, choose the one that prevents both autogamy and geitonogamy.

A

Monoecious plant bearing unisexual flowers

B

Dioecious plant bearing only male or female flowers

C

Monoecious plant with bisexual flowers

D

Dioecious plant with bisexual flowers

Text Solution

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The correct Answer is:
B
NA
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(a) Describe any two devices in a flowering plant which prevent both autogamy and geitonogamy. (b) Explain the events upto double fertilization after the pollen tube enters one of the synergids in an ovule of an angiosperm .

ARIHANT NEET-SEXUAL REPRODUCTION IN FLOWERING PLANTS -ASORTED QUESTIONS
  1. A pollinium consists of

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  2. Autogamy can occur in a chasmogamous flower if

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  3. From among the situations given below, choose the one that prevents bo...

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  4. A dicotyledonous plant bears flowers but never produces fruits and see...

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  5. In a fertilised embryo sac, the haploid, diploid and triploid structur...

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  6. The male gametes of angiosperms are

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  7. After penetrating stigmtic and stylar tissue, the pollen tube usually ...

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  8. At which stage, one can distinguish between nuclear and cellular type ...

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  9. While planning for an articifical hybridisation programmme involving d...

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  10. There are at lest two families where the product of double fertilisati...

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  11. The sequence of development during the formation of endosperm is

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  12. Choose the correct statement from the following.

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  13. Even after killing the generative cell with a laser beam, the pollen g...

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  14. Pollen grains that would easily germinate on stigma are found to germi...

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  15. In angiospermsm, each pollen grain produces to male cells. What do the...

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  16. IN Tape Grass (= Vallisneria )

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  17. A botanist treated some pollen grains with enzymes, chemical and high ...

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  18. Cross-pollination offers certain advantages as well as disadvantages t...

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  19. There is only one female Borasses palm on an island and no male palms....

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  20. Choose the correct match.

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