Which of the following components of our food is digested by an enzyme that is present in both saliva and pancreatic juice?

Name the following:
$(a)$ The process in plants that links light energy with chemical energy
$(b)$ Organisms that can prepare their own food
$(c)$ The cell organelle where photosynthesis occurs
$(d)$ Cells that surround a stomatal pore
$(e)$ Organisms that cannot prepare their own food
$(f)$ An enzyme secreted from gastric glands in the stomach that acts on proteins

A student is observing the temporary mount of a leaf peel under a microscope. Draw a labelled diagram of the structure of stomata as seen under the microscope.

Which of the following organisms has the longest small intestine?

Name three different glands associated with the digestive system in humans. Also name their secretions.

Which is the basic requirement of living organisms for obtaining energy?