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Anatomically fairly old dicotyledonous r...

Anatomically fairly old dicotyledonous root is distinguished from the dicotyledonous stem by

A

Absence of secondary xylem

B

Absence of secondary phloem

C

Presence of cortex

D

Position of protoxylem

Text Solution

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The correct Answer is:
D
In stems, the protoxylem lies towards the centre (pith) and the metaxylem lies towards the periphery of the organ. This type of primary xylem is called endarch. In root , the protoxylem lies towards periphery and metaxylem lies protoxylem lies towards periphery and metaxylem lies towards the centre, such arrangement is called exarch.
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  3. Anatomically fairly old dicotyledonous root is distinguished from the ...

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  4. Palisade parenchyma is absent in leaves of

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  5. Exarch xylem is found in

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  6. The vascular cambial ring of a dicot stem is

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  7. Consider the following statement (A) In a dicot root, the vascular b...

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  8. Which of the following figure of dicot stem is correctly labelled

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  9. The following figure is old typical dicot root, Identify A, B, C and ...

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  10. Vascular bundles in dicot stem are

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  11. Which of the following is correct sequence of layers in typical monoco...

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  12. Monocot root differs from dicot root in

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  13. Pith is a central part of the ground tissue generally made up of

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  14. In a dorsiventral leaf, location of palisade tissue and phloem is resp...

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  15. T.S. of stem of Cucurbita can be indentified from the T.S. of sunflowe...

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  16. Which of the following is seen in a monocot root

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  17. In monocot stem, following is absent

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  18. A diagram of T.S. of dicot root is given, select the option which corr...

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  19. In the diagram of lenticel identify the parts as A, B, C, D

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  20. Centripetal xylem is the characteristic of

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