AP BIOLOGY

Detailed explanation-1: -The stem is a plant axis that carries buds, shoots with leaves, and roots at its base. Region of the stem called where leaves take birth: Nodes are the interval where lateral buds and leaves emerge from the stem, and the spaces between the nodes are known as internodes.

Detailed explanation-2: -These are the nodes and internodes. Nodes are where buds grow into leaves, stems, or flowers. Internodes are the parts of the stem in between the nodes. In most plants, stems are found above the ground.

Detailed explanation-3: -A node is an area on a stem where buds are located (figure 6). It is a site of great cellular activity and growth. It is here that small buds develop into leaves, stems or flowers.

Detailed explanation-4: -If more than one blade is attached to a single petiole it is known as compound leaves. Therefore, it is the node from where leaves arise from a branch part of the stem. Note: The arrangement of leaves on the stem is known as phyllotaxy.

Detailed explanation-5: -leaf node (plural leaf nodes) (botany) One of the spots upon a stem where buds and intercalary meristems occur, usually marking the end of a season’s growth.