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Function of companion cells is...

Function of companion cells is

A

Loading of sucrose inot sieve elements by passive transport

B

Loading of sucrose into sieve elements

C

Providing energy to sieve elements for active transport

D

Providing water to phloem

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The correct Answer is:
B
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AAKASH INSTITUTE ENGLISH-ANATOMY OF FLOWERING PLANTS -Section C Previous Year Questions
  1. cork/bottle cork is formed from

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  2. As compared to a dicot, root, a monocot root has

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  3. Function of companion cells is

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  4. Ground tissue includes

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  5. In land plants, the gurad cells differ from other epidermal cells in h...

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  6. The cork cambium, cork and secondary cortex are collectively called

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  7. Which one of the following is wrongly matched

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  8. Some vascular bundles are described as open because these

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  9. The chief water conducting elements of xylem in gymnosperms are

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  10. Which one of the following is not a lateral meristem ?

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  11. Heartwood differs form sapwood in

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  12. Transport of food material in higher plants takes place through

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  13. Anatomically fairly old dicotyledonous root is distinguished formt eh ...

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  14. The annular and spirally thickened conducting elements generally devel...

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  15. Palisade parenchyma is absent in leaves of:

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  16. In barely vascular bundles are

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  17. Reduction in vascular tissue, mechanical tissue and cuticle is charact...

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  18. Vascular tissues in flowering plants develop from

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  19. The length of different internodes in a culm of sugarcane is variable ...

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  20. For a critical study of secondary growth in plants, which one or the f...

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