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Allogamy has to be always performed with...

Allogamy has to be always performed with the help of
(A) external agency
(B) self mechanism
(C) only wind
(D) only man

A

external agency

B

self mechanism

C

only wind

D

only man

Text Solution

Verified by Experts

The correct Answer is:
A
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KUMAR PRAKASHAN-SEXUAL REPRODUCTION IN FLOWERING PLANTS-Section -F (Multiple Choice Questions)
  1. ……favours autogamy (A) Dicliny (B) Dichogamy (C) Hekrogamy (D) ...

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  2. The flower may be of two or more types with regard to the length of st...

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  3. Allogamy has to be always performed with the help of (A) external age...

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  4. Allogamy is best favoured by (A) cleistogamy (B) dicliny (C) homo...

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  5. Allogamy is very useful because it results in (A) Formation of male ...

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  6. Another term for cross-pollination is (A) allogamy (B) xenogamy ...

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  7. The most exceptional feature of zoophilous flower is (A) scented havi...

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  8. In bisexual flowers, stamen and carpel mature at different times, by w...

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  9. In bisexual flowers, stamen and carpel mature at different times, by w...

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  10. …….is favoured by protandry (A) Self pollination (B) Cross pollinat...

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  11. To avoid self-pollination and provide contrivance for cross pollinatio...

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  12. Maize flowers are (A) autogamous (B) entomophilous (C) anemophilo...

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  13. In ……..flowers the stigma is always branched rough and sticky (A) ent...

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  14. Pollen grains of flower pollinated by wind or insects are not….. (A) ...

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  15. Besides tube nucleus, the pollen tube at the time of the entry of embr...

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  16. Egg apparatus is present on (A) micropylar end (B) chalazal end ...

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  17. Pollen tube is composed of (A) pectin (B) cutin (C) sporopollenin...

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  18. Which of the following promote pollen germination and tube growth?

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  19. How many nuclei are involved in double fertilization?

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  20. The pollination with the help of wind is termed as (A) anemophily (...

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