alleryStart learning →An increase in the thickness or girth of a plant is produced by cell division in which meristem?
AThe apical meristem
BThe intercalary meristem
CThe root meristem
DThe lateral meristem
Answer & Solution
Correct answer: D. The lateral meristem
1. Growth in length is primary growth and comes from the shoot and root apical meristems.
2. Growth in thickness or girth is secondary growth and comes from cell division in the lateral meristem.
3. So an increase in girth points to the lateral meristem.
4. Intercalary meristems lengthen monocot leaf blades from the base, so they add length rather than girth.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 30 "Plant Form and Physiology", section 30.2 Stems_
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