They do so by absorbing light and heat from the sun's rays, which combines with water in their vascular systems to form glucose, which is a type of sugar that protists use for energy. Most protists that perform photosynthesis live on land, although several sea-dwelling species use this tactic too. read more
Some protists obtain energy through photosynthesis while others do so by digesting either hunted food or decomposing matter. Protists are a diverse group that consists of plant-like, animal-like and fungi-like organisms. read more
they obtain nutrients by means of phagocytosis, or cell eating, which is considered a form of heterotrophy. Also, since protists include algae, they are autotrophic meaning that they synthesize their own energy from nonliving sources, such as the sun. read more