Question

Some species of aquatic plants increase aeration of plant tissues by accumulating

A) methane in the stem.
B) ethylene in the roots.
C) oxygen in the leaves.
D) nitrogen in the roots.

Answer 1

Aquatic plants increase aeration of plant tissues by accumulating oxygen in the leaves through adaptations like pneumatophores or aerenchyma.

Step-by-step explanation:

Some species of aquatic plants increase aeration of plant tissues by accumulating oxygen in the leaves.

These plants have adaptations such as pneumatophores or aerenchyma that allow for gas exchange between the roots and the surrounding water. For example, mangroves and cypress trees have upward-growing roots called pneumatophores, while wild rice has large air spaces in the root cortex called aerenchyma. These adaptations provide a pathway for oxygen to reach the root tips, which are embedded in oxygen-poor bottom sediments.