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Which of the following statement is true...

Which of the following statement is true for vallisneria?
(A) Male flower come to surface of water and release their pollen on water
(B) The female flowers have waxy stigma, water around them become concave discs
(C) The stalks becomes spirally coiled like a spring and fertilized flowers are withdrawn into water
(D) All the above statement are true

A

Male flower come to surface of water and release their pollen on water

B

The female flowers have waxy stigma, water around them become concave dises

C

The stalks becomes spirally coiled like a spring and fertilized flowers are withdrawn into water

D

All the above statement are true

Text Solution

Verified by Experts

The correct Answer is:
D
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KUMAR PRAKASHAN-SEXUAL REPRODUCTION IN FLOWERING PLANTS-Section -F (Multiple Choice Questions)
  1. Pollination by wind is

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

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

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  4. In…..female flowers remais submerged in water and the pollen grains ar...

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  5. Which of the following birds helps in pollination? (A) Sun birds (B...

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  6. Entomophily is pollination by….. (A) reptiles (B) insects (C) rod...

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  7. To prevent inbreeding self-incompatibility is found in

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  8. Dioecious plant which prevents both autogamy and geitonogamy (A) Cast...

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  9. Apomixis in plant means development of a plant (A) from root cutting ...

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  10. Development of sporophyte without gametic fusion is known as (A) apom...

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  11. What is parthenogenesis? (A) Development of fruit without hormones ...

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  12. Pollination is best defined as (A) The transference of pollens from a...

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  13. A microspore mother cell forms (A) embryo sac (B) pollen Grains (...

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  14. One of the most resistant biological material known is (A) sporopolle...

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  15. How many pollen mother cells will produce 1000 pollen grains? (A) 100...

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  16. In angiosperms how many microspore mother cells are required to produc...

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  17. The formation of 256 pollen grains is done by how many meiotic divisio...

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  18. When a microspore mother cell with 40 chromosomes undergoes meiosis ea...

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  19. The odd one is (A) micropyle (B) nucellus (C) embryo sac (D) Po...

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  20. What is produced by male gametophyte in angiosperms?

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