Question

Amoeba acquires its food through a process called
A)Exocytosis
B)Endocytosis
C)Plasmolysis
D)Both A and B

Answer 1

Hint: Amoeba reveals a holozoic mode of diet. The mode of nutrition takes place in five stages: ingestion, digestion, absorption, assimilation and egestion. Ingestion is the first stage in which solid food is taken within the body of the amoeba as a whole.

Complete answer:
Amoeba is a unicellular organism that primarily lives in marine or aquatic environments. It obtains its food through a holozoic system of feeding. The species in this mode of feeding take the entire solid or liquid food and digest it within the body. Nutrition in amoeba occurs
in the following stages.

Ingestion is described as the mechanism by which the food is consumed or swallowed. The amoeba consists of false legs known as 'pseudopodia,' which helps to engulf the food. Amoeba spreads these pseudopodia and engulfs the food that forms a vacuole.

Digestion is the process of breakdown of complex food matter into simpler forms known as digestion. With the aid of digestive enzymes, the engulfed food in the food vacuole is converted into soluble forms.

Absorption-All the food that has been digested must be passed on to the blood. The process
of transferring the digested food into the blood is known as absorption. This method is also called the diffusion process.

Assimilation-This is the mechanism in which amoeba obtains energy from the digested ingested food material. Absorbed food materials are used to generate energy for a number of life processes.

Egestion -All the undigested food content needs to be thrown out of the body. This mechanism happens by breaking up the cell membrane and extracting the waste.
Exocytosis is a mechanism by which molecules are released from the body of an organism. Endocytosis is the mechanism by which a molecule reaches the body of an organism.

Hence, the correct answer is option (B)

Note: Amoeba is a single-cell organism. It demonstrates a holozoic mode of nutrition where it engulfs the entire food and digests it with different digestive enzymes. This food molecule engulfing process is called endocytosis or phagocytosis.