Protists are mostly microscopic and have no organs or tissues. They are single-celled but may occur in colonies. They may be free-living on land or in water, or live in association with other plants and animals. An amoeba is an organism that is readily found in pond water. The outline of the single-celled body changes constantly as it moves and has no permanent shape.
Amoebas feed themselves by trapping food particles in the surrounding water.
Their cell parts can become more fluid to stretch out and form false feet around food bits. They are predators of other protozoans and minute animals. As with many kingdoms, there are several ways of classifying the plants. The diagram above is the most common. Each group below kingdom is referred to by botanists as a division and is equivalent to a phylum.