High School

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Photosynthesis is the lifeline of the plant ecosystem, and this phenomenon mostly takes place in the palisade _______.

A) chloroplasts
B) cells
C) layer
D) tissues

Answer :

Final answer:

Photosynthesis primarily happens in the palisade layer of a leaf's mesophyll because this layer contains the most chloroplasts, which are essential for this process. The correct answer to the question is c) layer.

Explanation:

Photosynthesis is the lifeline of the plant ecosystem, and this phenomenon mostly takes place in the palisade layer.

The palisade layer is part of the mesophyll and contains cylindrical cells that are packed with chloroplasts—the site where photosynthesis is primarily conducted.

These cells are oriented with their long axis perpendicular to the plane of the leaf, allowing for maximum light absorption.

The mesophyll also includes an airy spongy layer, which is responsible for storage and gas exchange.

The gas exchange of carbon dioxide and oxygenthrough stomata, which also help to regulate water balance within the plant.

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