Question

how do the roots of plants growing in Swamp in marshes obtain their oxygen
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Answer 1

Answer:

To accommodate this, many swamp plants have hollowed stems that transport oxygen down to the roots where they are needed. Others have special air spaces in their roots called aerenchyma through which water-based oxygen ions can enter the roots and be used for survival.

Answer 2

Pneumatophores or rhizophora special type of root