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To avoid self-pollination and provide co...

To avoid self-pollination and provide contrivance for cross pollination, the pollen grains of some flowers have no fertilizing effect on the stigma of the same flower but causes death. What is this condition called?
(A) Homogamy
(B) Dicliny
(C) Self sterility
(D) dichogamy

A

Homogamy

B

Dicliny

C

Self sterility

D

dichogamy

Text Solution

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The correct Answer is:
C
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KUMAR PRAKASHAN-SEXUAL REPRODUCTION IN FLOWERING PLANTS-Section -F (Multiple Choice Questions)
  1. In bisexual flowers, stamen and carpel mature at different times, by w...

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

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

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

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

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

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

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

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

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

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  11. How many nuclei are involved in double fertilization?

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

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  13. In which of the following cleistogamous flowers are present ? (A) Bal...

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  14. The largest inflorescence of the world is pollination by (A) insects ...

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  15. The chief pollinator of our agri - horticultural crops are…. (A) moth...

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  16. In….. Cleistogamous flower are produced on underground rhizomes or roo...

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  17. In bisexual flower physical barrier between anther and stigma is calle...

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  18. Pollination by wind is

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  19. Which of the following is not an example of water pollinated plant? (...

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  20. Which of the following statement is true for vallisneria? (A) Male fl...

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