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The acitvity of sieve tubes is remotely ...

The acitvity of sieve tubes is remotely controlled by the nucleus of

A

Phloem parenchyma

B

Companion cells

C

Phloem fibers

D

Both phloem parenchyma and phloem fibres

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The correct Answer is:
B
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CENGAGE BIOLOGY-ANATOMY OF FLOWERING PLANTS -ARCHIVES
  1. The acitvity of sieve tubes is remotely controlled by the nucleus of

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  2. passage cells are thin- walled cells found in

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  3. For a critical study of secondary growth in plants, which one of the...

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  4. Which one of the following is resistant action

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

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  6. Vascular tissues in flowering plants develop from

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  7. Which one is encleacted ?

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  8. In barley stem vascular bundles are

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  9. Palisade parenchyma is absent in leaves of

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  10. The annular and spirally thickened conducting elements generally deve...

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  11. Anatomically fairly old dicotyledonous root is distinguished from the ...

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  12. heart wood differs from sapwood in

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  13. Which one of the following is not a lateral meristem

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

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  15. Ground tissue includes

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

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  17. Which of the following is wrongly matched ?

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  18. In land plants the guard cells differ from other epidermal cells in ha...

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  19. The cambium which produces cork is known as Or The common bottle c...

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  20. Closed vascular bundles lack

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  21. Water containing cavities in vascular bundles are found in

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