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Extensions of root epidermal cells that raise absorbing surface area are:

ARoot hooks
BRoot horns
CRoot hoods
DRoot hairs
Answer & Solution
Correct answer: D. Root hairs
1. They are thin outgrowths of surface cells. 2. They greatly increase contact with soil. 3. They are root hairs. _Source: OpenStax Biology 2e, Chapter 30, Plant Form and Physiology._
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