alleryStart learning →Lateral roots arise from which layer of the root?
AThe endodermis
BThe pericycle
CThe epidermis
DThe root cortex
Answer & Solution
Correct answer: B. The pericycle
1. The outermost cell layer of the root vascular tissue is the pericycle.
2. It forms the outer boundary of the stele and is the layer from which lateral roots can arise.
3. The endodermis lies just outside the stele and works as a selective barrier, not as a source of new roots.
4. Epidermis and cortex are outer tissues and give rise to root hairs and storage cells rather than branch roots.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 30 "Plant Form and Physiology", section 30.3 Roots_
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