AP BIOLOGY

PLANTS

THE LEAF

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
the stalk that joins a leaf to a stem; leafstalk.
A
annual
B
perennial
C
petiole
D
simple leaf
Explanation: 

Detailed explanation-1: -Petiole: The narrow cylindrical stalk that attaches the lamina of the leaf with the node of the stem is called the petiole. Some leaves that are attached to the stem without the presence of a petiole are called sessile leaves.

Detailed explanation-2: -The petiole is a stalk that connects the blade with the leaf base. The blade is the major photosynthetic surface of the plant and appears green and flattened in a plane perpendicular to the stem.

Detailed explanation-3: -The petiole is a stalk that attaches a leaf to the plant stem. In petiolate leaves the leaf stalk may be long (as in the leaves of celery and rhubarb), or short (for example basil). When completely absent, the blade attaches directly to the stem and is said to be sessile.

Detailed explanation-4: -Abstract. A plant leaf is generally composed of a petiole and a leaf blade. The petiole connects the leaf blade to the plant stem and, from a structural viewpoint, it resembles a cantilever beam.

Detailed explanation-5: -Leaf Stalks (petioles) Leaves may be attached to the stem by a petiole (short stalk) or may be sessile (attached directly to the stem). Some sessile leaves clasp the stem. stem by a stalk (petiole).

There is 1 question to complete.