An amoeba,a protozoan that moves by pseudopodia,approaches a smaller protozoan and extends its pseudopodia (extensions of cytoplasm in plasma membrane)around the smaller protozoan.Once the amoeba's pseudopodia completely surrounds the other protozoan,the amoeba's plasma membrane pinches off by folding back into the amoeba and creating a vesicle containing the smaller protozoan.This vesicle is now within the amoeba itself and will soon fuse with other vesicles containing digestive enzymes.This is an example of

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This process is phagocytosis, where the amoeba engulfs the smaller protozoan with pseudopodia and forms a vesicle, which will then fuse with other vesicles containing digestive enzymes for breakdown and absorption of nutrients. Pinocytosis is the process of taking up fluids, while osmosis is the net movement of water across a selectively permeable membrane. Exocytosis is the opposite process of bringing substances out of the cell, which does not apply in this scenario.

An Amoeba,a Protozoan That Moves by Pseudopodia,approaches a Smaller Protozoan