What is a primary characteristic of Sarcodina?

Sarcodina, a group within the protozoa, is primarily characterized by their ability to form pseudopodia. Pseudopodia are temporary projections of the cell membrane and cytoplasm that allow these organisms to move and engulf food particles. This form of locomotion and feeding is essential for many members of Sarcodina, such as Amoeba, which utilize these extensions to capture prey through a process known as phagocytosis.

The ability to generate pseudopodia distinguishes Sarcodina from other groups of protozoa that may rely on different structures for movement or feeding. Understanding this characteristic is crucial when identifying and studying various protozoan groups and their ecological roles.