What are parts of a leaf?

What is a leaf?

Match the parts of leaf modified into tendirls with the exaples of plant

Which of the following is not part of a leaf?

In an experiment a part of a leaf is inserted in a test tube containing some KOH soaked cotton, while the other half is exposed to air. The setup is then placed in light for some time. On testing for the presence of starch later in the two parts of the leaf-

The part of the leaf that helps in cooling the leaf surface

Petiole part of the leaf is known as