alleryStart learning →Which structure protects the tip of a growing root and is continuously replaced?
AThe root cap
BThe pericycle
CThe endodermis
DThe root hair
Answer & Solution
Correct answer: A. The root cap
1. The root tip is protected by the root cap, a structure exclusive to roots.
2. Pushing through soil damages it easily, so it is continuously replaced.
3. The pericycle and the endodermis are internal layers of the root and do not shield the tip.
4. Root hairs are absorptive extensions of epidermal cells further back from the tip.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 30 "Plant Form and Physiology", section 30.3 Roots_
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