The answer is: "dopamine" .
__________________________________
The actively dividing cells, or meristems, control plant growth. Primary (apical) meristems, the dividing tissue at the tips of the roots, grow longer roots, and secondary meristems, the dividing tissue seen in the cross-sections, grow thicker roots.
C.) D<span>iscontinue the use of irrigation systems</span>
*The rate at which radioactive decay occurs.
*How much radioactive decay has occurred.
