Primary Growth in Roots Originates from ____

Question

Primary growth in roots originates from ____.  
A) dermal cells
B) vascular cells
C) apical meristems
D) lateral meristems
E) the pericycle

Accepted Answer

Primary growth in roots originates from the apical meristems, located at the tips of the roots. These meristems are responsible for generating new cells that elongate and differentiate into the different tissues of the root, including the dermal, vascular, and ground tissues. Lateral meristems, such as the cambium, are responsible for secondary growth, which occurs in some plants but not in roots. The pericycle is a specialized tissue layer in roots that gives rise to lateral roots.