urgent!!
In gravitropism, auxin affects the cells in shoots and roots in opposite ways.
How are the two effects different?
OA. In stems, more auxin causes cells to grow longer. In roots, less
auxin causes cells to grow longer.
B. In stems, less auxin causes cells to strengthen. In roots, more
auxin causes cells to strengthen.
C. In stems, less auxin causes cells to shorten. In roots, more auxin
causes cells to shorten.
OD.
stems, more auxin causes cells to grow wider. In roots, less
auxin causes cells to grow wider.