AP BIOLOGY

Detailed explanation-1: -The correct option is A. Alternate. In alternate leaves arrangement, leaves are arranged alternately on the stem with one leaf per node in a straight line. When two leaves are attached at the same position on opposite sides of the stem, the leaf arrangement is called opposite.

Detailed explanation-2: -In alternate-leaved plants, the leaves are single at each node and borne along the stem alternately in an ascending spiral. In opposite-leaved plants, the leaves are paired at a node and borne opposite to each other.

Detailed explanation-3: -Alternate leaves connect to the stem one at a time. Opposite leaves connect to the stem in pairs. Whorled leaves connect to the stem in groups, making a whorl. Basal leaves connect to the base of the plant.

Detailed explanation-4: -ALTERNATE: leaves alternate along the stem, so that only a single leaf is attached at each node. Alternate is a general term, and alternate leaves can be spirally alternate or planar. OPPOSITE: leaves in pairs along the stem, so that two leaves are attached at each node.

Detailed explanation-5: -Alternate phyllotaxy is an arrangement of leaves in which one leaf is present at each node. All the leaves lie in the same plane. 2. Opposite phyllotaxy: in this type of phyllotaxy; two leaves are present on each node.