Name the following: The cell organelle where photosynthesis occurs.

$(a)$ Name the organs which secrete the following enzymes in the human digestive system:
$(i)$ Pepsin
$(ii)$ Salivary amylase
$(iii)$ Trypsin
$(iv)$ Lipase
$(b)$ Name the organs which perform the following functions in the human alimentary canal:
$(i)$ Absorption of digested food
$(ii)$ Absorption of water

What is chlorophyll? What role does chlorophyll play in the process of photosynthesis?

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

In the following questions, a statement of Assertion is given followed by a statement of Reason. Mark the correct answer as:
Assertion: Nutrition in $Amoeba$ takes place with the help of $pseudopodia$.
Reason: Different stages of nutrition in $Amoeba$ are ingestion, digestion, absorption, and egestion.

Water is listed as one of the basic: