Question

Roshawn notices that the outer layer of some leaves are smooth while others have jagged edges. What is the correct term for the outer layer of a leaf regardless of its edges?

1) Margin
2) Teeth
3) Smooth
4) Jagged

Answer 1

The correct term for the outer layer of a leaf, regardless of whether the edges are smooth or jagged, is the 'margin'.

Step-by-step explanation:

The correct term for the outer layer of a leaf, regardless of its edges, is the margin. The structure of a typical leaf includes the lamina, which is the widest part of the leaf, and often includes a petiole which attaches the leaf to the stem. The variability in leaf structure, such as the presence of teeth or if it is smooth, has to do with the environmental adaptations, but the term margin refers to the edge of any leaf type.