Animal-like protists, known as protozoa, primarily exhibit characteristics similar to animals. They are generally motile, meaning they can move independently and actively. These organisms often consume other organisms for sustenance, a process known as heterotrophy. Common examples include amoebas, paramecia, and flagellates, which use various methods such as pseudopodia, cilia, or flagella to navigate and hunt for food.
In contrast, plant-like protists, commonly referred to as algae, possess characteristics similar to plants. These organisms are typically autotrophic, meaning they can create their own food through photosynthesis. They contain chlorophyll and other pigments, allowing them to convert sunlight into energy. Examples of plant-like protists include diatoms, dinoflagellates, and euglenoids. They often inhabit aquatic environments and contribute significantly to oxygen production and the base of the food chain.
In summary, the primary differences between animal-like and plant-like protists lie in their modes of nutrition and movement. While animal-like protists actively seek out food and are motile, plant-like protists use photosynthesis to create their own food and tend to be non-motile or less mobile.