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Flowers are unisexual in...

Flowers are unisexual in

A

China rose

B

Onion

C

Pea

D

Cucumber

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The correct Answer is:
D
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Flower are unisexual in

Given below are five statements (i-v) regarding constrivances to ensure cross - pollination is plants (i) Dicliny - Anthers stigmas mature at different times in a bisexual flower. (ii) Dichogamy - Flowers are unisexual. (iii) Prepotency - Pollen grains of the same flower germinate more rapidly over the stigma than the pollen grains another flower. (iv) Heterostyly - Two or three types of flowers with different heights of styles. (v) Herkogamy - A mechanical device to prevent self - pollination which of the above statement are correct ?

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Which of the following flowers is unisexual ?

Entry of pollen tube into ovule through chalaza was first discovered by treub in a xerophyte. The plant is associated with a pair flowers (i) unisexual flowers ( ii) sessile flowers (iii) centripetal arrangement of flowers (iv) bisexual flowers. The correct pair is

The reasons for Mendel's success was I. attention was focussed only on one character at a time during hybridisation experiment. ii. Gradual planned approach towards the experimental plant. III. Maintenance of accurate records of results obtained. iv. the pea plant flowere wee unisexual. choose the correct option.

MODERN PUBLICATION-REPRODUCTION IN ORGANISMS-COMPETITION FILE OBJECTIVE TYPE QUESTIONS (MULTIPLE CHOICE QUESTIONS (MCQs)):
  1. Both, autogamy and geitonogamy are prevented in

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  2. In general, pollen tube enter the ovule through

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  3. Transfer of pollen grains from anther to the stigma of another flower ...

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  4. The endosperm cells in angiosperms are

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  5. The fleshy edible part of an apple is

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  6. Why asexual reproduction is sometimes disadvantageous ?

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  7. Product of sexual reproduction generally generates

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  8. An unorganised mass of cells is called

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  9. A few plants exhibit unusual flowering phenomenon, which of them fl...

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  10. There are various types of reproduction. The type of reproduction adop...

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  11. Which one of the following is not a natural method of vegetative propa...

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  12. Which one of the following plants does not help in vegetative ...

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  13. Which of the following pairs is not correctly matched?

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  14. Flowers are unisexual in

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  15. Which of the following statements is not correct?

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  16. Which of the following flowers only once in its life-time

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  17. Vegetative reproduction in onion occurs by:

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  18. Select the incorrect statement.

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  19. In Antirrhinum (Snapdragon), a red flower was crossed with a-white fl...

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  20. Which of the following statements is incorrect ?

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