List the three basic leaf shapes, In what other ways do
leaves vary from plant to plant?

1. Broad and flat leaf, 2. Long and narrow leaf, 3. Needlelike or saclelike. Leafs vary in a variety of sizes, in variety of textures, and in other ways.

an active site is a region that is present on an enzyme where the reactants or the substrate molecules we can say bind and experience a chemical reaction. the substrate is basically a reactant whose concentration is changing and that is converting into a product after binding at the active site of an enzyme