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Pollen grains lose viabiliyt within 30 m...

Pollen grains lose viabiliyt within 30 minutes of their release in:

A

some legumes like pea and gram

B

Some cereals like rice and wheat

C

Members of Rosaceae

D

Members of Solanaceae

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The correct Answer is:
B
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Assertion : Pollen grains of many species cause severe allergies and bronchial afflictions in some people leading to acute respiratory disorders-asthma, bronchitis, etc. Reason : In some members of Rosaceae, Leguminoseae and Solanaceae, pollen grains lose viability within 30 minutes of their release.

Himgiri variety which is resistant to hill bunt disease belongs to taxon in which pollen grains lose viability within 10 minutes of their release. The taxon belongs to

Pollen grain is

Pollen grain is

How can pollen grains of wheat and rice which tend to lose viability within 30 minutes of their release be made available months later for bredding programmes ?

The pollen grains lose their viability in 30 minutes in

Pollen grains are shed at

Pollen grains of rice and wheat lose their viability in ….. Minutes of their release

GRB PUBLICATION-SEXUAL REPRODUCTION IN FLOWERING PLANTS-NCERT Corner
  1. The microsporangia develop further and become:

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  2. The pollen grains represents the:

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  3. The hard outer layer of pollen grains called exine is made up of:

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  4. Prollen grains are well preserved as fossils because of the presence o...

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  5. Which of the following has been claimed to increase the performance of...

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  6. Pollen grains lose viabiliyt within 30 minutes of their release in:

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  7. Arising from the placenta are the megasporangia, commonly called:

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  8. Opposite the micropylar end, representing the basal part of the ovule ...

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  9. In embryo sac, three cells are grouped together at the micropylar end ...

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  10. The only type of pollination which during pollination brings genetical...

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  11. Hair present on the cob of corn are Or Long filamentous threads pr...

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  12. The condition which prevents both autogamy and geitongamy is:

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  13. Floral rewards providing safe places to lay eggs occur in:

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  14. The central cell of embryo sac after triple fusion becomes:

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  15. The tissue in which cells are filled with reserve food materials and a...

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  16. The mature embryo in angiosperms is:

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  17. In grass family, the cotyledon is called:

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  18. The residual, persistent nucellus is called:

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  19. The wall of the ovary develops into:

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  20. A few fowering plants such as some species of Asteraceae and grasses h...

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