Roots grow longer because of cell division in the:
AApical meristem (at the root tip)
BLateral meristem
CIntercalary meristem
DPhloem
Answer & Solution
Correct answer: A. Apical meristem (at the root tip)
Apical meristems sit at the tips of roots and shoots.
Their division pushes the tip forward (in roots: downward into the soil), increasing length.
If you cut off the root tip, longitudinal growth stops — which is why pruning a plant tip stunts vertical growth.
Keep practising Unit 8N: Ecosystem Services, Succession & Global Change
Browse all Unit 8N: Ecosystem Services, Succession & Global Change questions for AP Biology, or explore more Biology topics.
Related questions
In SEXUAL reproduction, the offspring inherit:After the tip of a young plant stem is cut off, the stem stops growing in length but new bA scientist observes thin, rectangular, tightly packed cells forming a single outer layer The increase in GIRTH (thickness) of a tree trunk is due to:Which plant tissue is responsible for ACTIVE cell division (growth)?A group of cells of similar structure that work together to perform a specific function isThe outermost protective layer of the plant body is:At which embryonic stage are the primary germ layers first clearly established in animals?