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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 fibres

D

Both phloem parenchyma and phloem fibres

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The correct Answer is:
B
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ARIHANT NEET-ANATOMY OF FLOWERING PLANTS -Chapter exercises ( Taking it together Assorted Questions of the Chapter for Advanced Level Practice)
  1. Root apical meristerm (root apex) appears cup-shaped (roughly hemisphe...

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  2. Parenchyma cell as found in

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

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  4. In sieve elements, the possible function of p-proteins is

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  5. Which is correct about transport or conduction of substances

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  6. A vesselless piceof stem possessing prominent sieve tubes would belong...

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  7. A common structural feature of vessel elements and sieve tube elements...

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  8. In which of the following, the cuticle layer covering the outer surfac...

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  9. Thick-Walled cells of pericycle as found in Linum (flax) and Connabis ...

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  10. What is the fate of primary xylem in a dicot root showing extensive se...

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  11. In monocot roots which types of vascular bundles are found

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  12. Velamen is primarily an absorptive tissue, but it may

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  13. velamen found in epiphyic roots is meant for

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  14. Vascular cylinder in dicot stems occurs in the form of distinctly sepa...

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  15. Number of vascular bundles in a leaf-vein of dicot

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  16. The vascular bundle present in the midrib of a dicot leaf is

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  17. Bundle sheath extensions are collenchymatous on the vascular bundles o...

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  18. The oldest layer of secondary phloem in a stem lies

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  19. A cut trunk shows 26 concentric rings of spring wood and autum wood in...

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  20. Increment borer is an instrument used to count

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