AP BIOLOGY

Detailed explanation-1: -Hint: The leaf margin is the boundary area of the leaf that is extending along the edge of the leaf. There are many types of leaf margins that are important for plant identification. While leaves on a single tree may have different sizes, they will have the same general shape and margin.

Detailed explanation-2: -The edge of the leaf is called the margin. Figure 30.8. 1: Parts of a leaf: A leaf may seem simple in appearance, but it is a highly-efficient structure. Petioles, stipules, veins, and a midrib are all essential structures of a leaf.

Detailed explanation-3: -ENTIRE: margin is smooth around entire leaf edge. CRENATE: margin has scalloped or rounded teeth. DENTATE: margin has square or rectangular teeth that point outwards.

Detailed explanation-4: -Leaf Edges or Margins Entire Leaf: The margin is even and smooth around the entire leaf edge. Examples are magnolia or dogwood tree leaves. Toothed or Serrated Leaf: The margin has a series of toothlike pointed teeth around the entire leaf edge. Examples are elm and mulberry tree leaves.

Detailed explanation-5: -Leaf margin. The basic types of margins are: Entire: having a smooth edge with neither teeth nor lobes. Toothed : having a saw like margin with small tooth that can vary in size (from very small to medium), in sharpness (from needle-like to soft) and in shape (from rounded to points).