The presence of air cavities is an adaptation of

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Q: 44 (SSC/NA)
The presence of air cavities is an adaptation of

question_subject: 

Science

question_exam: 

SSC

stats: 

0,3,5,2,0,3,3

keywords: 

{'air cavities': [1, 0, 0, 0], 'desert plants': [0, 1, 0, 0], 'water plants': [1, 1, 0, 1], 'mesophytes': [1, 0, 0, 0], 'trees': [1, 0, 0, 0], 'adaptation': [2, 0, 2, 6], 'presence': [5, 1, 0, 1]}

The correct answer is option 3 - Water plants. Water plants have air cavities as an adaptation to their aquatic environment. These air cavities, also known as aerenchyma, help the plants to float and absorb oxygen from the water, which is necessary for their survival. The presence of air cavities allows water plants to maintain buoyancy and prevents them from sinking. Additionally, these air-filled spaces also aid in the transport of gases within the plant, facilitating the exchange of gases between the submerged parts of the plant and the atmosphere. This adaptation enables water plants to thrive in their aquatic habitats by ensuring sufficient oxygen supply for respiration.