Arrangement of leaves on a stem or branch is called ___________.
The correct option is D Phyllotaxy
Phyllotaxis is the study of arrangement of leaves on the stem. It is also called as phyllotaxy. There are three types of leaves arrangement on the stem. These are whorled, opposite and alternate. In opposite phyllotaxy, the leaves are arranged one by one. In whorled phyllotaxy, at least three leaves grow from same node of stem. In alternate phyllotaxy, leaves grow one per node.