Answers

2015-05-24T17:53:08+05:30
InĀ order to provide buoyancy to the plants & to allow the circulation of gases large air spaces are present in aerenchyma.

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2015-05-25T19:53:08+05:30
The channles of air filled cavities provide a low-resistence internal pathway for the exchange of gases such as oxygen and ethylene between the plant above the water and the submerged tissues.

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