Question on: JAMB Biology - 2001
The stem of a typical aqautic plant usually has many
A
air cavities
B
intercellular space
C
water cavities
D
water conducting cells
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Correct Option: A
The stem of a typical aquatic plant usually has many air cavities. These air cavities, also known as aerenchyma, are large air spaces within the plant tissue. They serve several important functions:
* **Buoyancy:** They help the plant float in water.
* **Gas Exchange:** They facilitate the movement of gases (oxygen and carbon dioxide) throughout the plant, which is crucial for photosynthesis and respiration.
* **Reduced Weight:** They reduce the overall weight of the plant, making it easier to stay afloat.
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