Describe the process of nutrition in $Amoeba$. Draw labelled diagrams to show the various steps in the nutrition of $Amoeba$.

(N/A) Nutrition in $Amoeba$ involves the following steps:
$(i)$ Ingestion: $Amoeba$ does not have a mouth. It ingests food by forming temporary finger-like extensions of the cell surface called pseudopodia. The food is engulfed with some water to form a food vacuole.
(ii) Digestion: Digestive enzymes from the cytoplasm enter the food vacuole and break down complex food substances into simple, soluble molecules.
(iii) Absorption: The digested food is absorbed directly into the cytoplasm by diffusion. The food vacuole disappears after the food is absorbed.
(iv) Assimilation: The absorbed food is used by the cell for energy production through respiration and for growth and repair.
$(v)$ Egestion: The undigested waste material is moved to the surface of the cell and thrown out of the body by the rupture of the cell membrane.