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Which part of the root is responsible for growth in size?

Clay

Micropores

Meristems

Meristems are the correct answer because they are responsible for growth in size in plants, including tree roots. Meristems are regions of plant tissue consisting of actively dividing cells. They give rise to various plant organs and tissues and are crucial for the growth and development of roots. Clay, micropores, and field capacity do not directly contribute to the growth in size of roots like meristems do.

Field Capacity

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