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According the Steward's starch hydrolysi...

According the Steward's starch hydrolysis theory, which one of the following is the principle reason for the opening of stomata during daytime

A

Influx of `K^(+)` ions into gurad cells under influence of ABA hormone

B

Conversion of suger into starch in guard cells

C

Efflux of `K^(+)`ions from guard cells under the influence of ABA hormono

D

Photosynthetic utilisation of `CO_(2) in guard cells.

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The correct Answer is:
D
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DINESH PUBLICATION-TRANSPORT IN PLANTS-REVISION QUESTIONS FROM COMPETITIVE EXAMS
  1. Transpiration- cohesion tension theory operaters in

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  2. Water absorption of root hairs occurs until

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  3. According the Steward's starch hydrolysis theory, which one of the fol...

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  4. Compare the statements a and b Statement a. To counteract the increase...

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  5. Cell A and cell B are adjacent plant cells. In cell A Psi(s)=-20 bars ...

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  6. Which one is the driving force for the process of passive absorption o...

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  7. Solute Potential of a solution is always

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  8. Stomata opening and closing is due to

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  9. Arrraction of water molecules to polar surfaces is known as

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  10. Given below is diagram of stomatal apperatus. Which option identifies ...

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  11. Apoplast is the system of adjacent cell walls that is continuous throu...

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  12. A negative effect of transpiration is

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  13. What causes opening of stomata

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  14. Movement of water from higher water potential to lower water potential...

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  15. Which of the following is not a purpose of transpiration

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  16. Which of the following is a rapid type of water absorption?

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  17. Which is not directly connected with ascent fo sap?

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  18. Tracheids are less efficient than vessels due to

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  19. Difference between osmotic pressure and turgor pressure is

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  20. Whose water potential is less then water potential of root hair during...

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