alleryStart learning →What is the function of lenticels on a mature woody stem?
AThey allow excess sugars to be released
BThey allow lateral roots to break outwards
CThey allow water droplets to be secreted
DThey allow interior cells to exchange gases
Answer & Solution
Correct answer: D. They allow interior cells to exchange gases
1. In some plants the periderm carries many openings called lenticels.
2. These openings let the interior cells exchange gases with the outside atmosphere.
3. That supplies oxygen to the living and metabolically active cells of the cortex, xylem and phloem.
4. Lateral roots instead arise from the pericycle inside the root, so the third option belongs to a different organ.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 30 "Plant Form and Physiology", section 30.2 Stems_
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