AP BIOLOGY

Detailed explanation-1: -In whorled type, more than two leaves arise at a node and form a whorl. For example Alstonia, hydrilla, Nerium (Oleander). Thus, the correct answer is ‘Three.

Detailed explanation-2: -The whorl type phyllotaxy is when more than three leaves develop at the nodes and form a whorl of leaves. The examples of plants of whorl type phyllotaxy will be sunflower, tulsi, sergula, alstonia etc.

Detailed explanation-3: -Whorled-In this, more than two leaves are formed from each node and are arranged in a whorl (e.g., Nerium, Alstonia etc)

Detailed explanation-4: -> Whorled phyllotaxy: When more than two leaves are present at a node, thereby forming a whorl, the arrangement is referred to as whorled phyllotaxy. Such an arrangement can be observed in Alstonia and Nerium.

Detailed explanation-5: -The leaves are in pairs or whorls of three, thick and leathery, dark-green, narrow lanceolate, 5–21 centimetres (2–8 inches) long and 1–3.5 cm (3⁄8–1+3⁄8 in) broad, and with an entire margin filled with minute reticulate venation web typical of eudicots.