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Question
Assertion :In woody stems, the amount of heartwood continues to increase year after year. Reason: The cambial activity continues uninterrupted.
Assertion :In woody stems, the amount of heartwood continues to increase year after year. Reason: The cambial activity continues uninterrupted.
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Solution
The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
In dicotyledonous stems, during intra stelar secondary growth, intra fascicular and inter fascicular cambia joins together and form into a ring of cambium is called vascular cambium. Its activity is continuous and uninterrupted. Due to the seasonal influence, it produces two types of secondary xylems, spring wood and autumn wood. Both these woods, together form into a ring of wood called annual ring or growth ring. Every annual ring becomes sap wood and every sap wood gradually transform into heat wood. Due to these transformations amount of heart wood increases.
So, the correct option is 'Both assertion and reason are correct, reason is the correct explanation for assertion'.
In dicotyledonous stems, during intra stelar secondary growth, intra fascicular and inter fascicular cambia joins together and form into a ring of cambium is called vascular cambium. Its activity is continuous and uninterrupted. Due to the seasonal influence, it produces two types of secondary xylems, spring wood and autumn wood. Both these woods, together form into a ring of wood called annual ring or growth ring. Every
annual ring becomes sap wood and every sap wood gradually transform into heat wood. Due to these transformations amount of heart wood increases.
So, the correct option is 'Both assertion and reason are correct, reason is the correct explanation for assertion'.
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