alleryStart learning →The zone of cell maturation in a root begins at which landmark?
AAt the outer edge of the root cap
BAt the first root hair on the root
CAt the point where lateral roots form
DAt the boundary of the endodermis
Answer & Solution
Correct answer: B. At the first root hair on the root
1. The three root zones need a visible landmark to separate elongation from maturation.
2. That landmark is the first root hair, and the zone of cell maturation begins there.
3. In this zone the root cells begin to differentiate into special cell types.
4. The root cap marks the far tip, well before elongation has even finished, so it cannot mark maturation.
5. Lateral roots arise later from the pericycle, so they mark a different event altogether.
6. The endodermis is an internal cylinder running along the root rather than a point along its length.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 30 "Plant Form and Physiology", section 30.3 Roots_
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