The area where the petiole detaches from the stem is referred to as the:

A) abscission zone.
B) middle lamella.
C) bundle sheath extension.
D) terminal bud.
E) bud scale scar.

Petiole

The stalk that attaches the leaf blade to the stem in vascular plants, enabling nutrient and water transport between the leaf and the rest of the plant.

Abscission Zone

The area at the base of the petiole where the leaf will break away from the stem. Also known as the abscission layer.

Bundle Sheath

Bundle sheath cells are specialized cells surrounding the vascular bundles in plants; they play a crucial role in the C4 photosynthetic pathway by concentrating CO2 around the enzyme RuBisCO.