Inner, darker and harder portion of seco...

Inner, darker and harder portion of secondary xylem that cannot conduct water, in an older dicot stem, is called

Albumum

Bast

Wood

Duramen

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Choose the correct alternative. Secondary growth does not occur in monocot/dicot stem.

These questions consist of two statement each, printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses. A. If both Assertion and Reason are true and Reason is a correct explanation of the Assertion. B. If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion. C. If Assertion is true but Reason is false. D. If both Assertion and Reason are false. Assertion: Secondary xylem formed during spring is called spring wood and secondary xylem formed in autumn is called autum wood. Reason. Spring wood and autumn wood is easily demarcated and leads to the formation of annual rings.

These questions consist of two statement each, printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses. A. If both Assertion and Reason are true and Reason is a correct explanation of the Assertion. B. If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion. C. If Assertion is true but Reason is false. D. If both Assertion and Reason are false. Assertion: In angiosperms the conduction of water is more efficient because their xylem has vessels. Reason: Conduction of water by vessel elements is an active process with energy supplied by xylem parenchyma rich in mitochondira.

Explain experimentally that stem helps in conducting water upwards.

What is the fate of primary xylem in a dicot root showing extensive secondary growth?

What forms the cambial ring in a dicot stem during the secondary growth?

Fill in the blanks: ………..functions as conducting tissue for water and …………….roots to stem and leaves.

MODERN PUBLICATION-ANATOMY OF FLOWERING PLANTS-EXAMPLE

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