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Assertion :There is no loss of water by transpiration below the forest canopy. Reason: Forest canopy is exposed to sunlight and wind and acts as effective wind and light barrier.


A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Both Assertion and Reason are incorrect
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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
A tropical rainforest has a number of layers, each with different plants and animals adapted for life in that particular area. Examples include the emergent, canopy, understorey and forest floor layers. 
The emergent layer contains a small number of very large trees called emergents, which grow above the general canopy, reaching heights of 4555 m. They need to be able to withstand the hot temperatures and strong winds that occur above the canopy in some areas. 
The canopy layer contains the majority of the largest trees, typically 30 metres to 45 metres tall. Receiving only 2-15% of the sunlight that falls on the canopy, the under story is a dark place. It is relatively open and contains young trees and leafy herbaceous plants that tolerate low light. So, there is no loss of water by transpiration below the forest canopy.

Biology

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