Are protozooans heterotrophs?

A heterotroph is any organism that requires organic subtrates in order to survive. Basically, a heterotroph is a consumer which must eat other animals and cannot produce its own food.

is an organism that cannot fix carbon and uses organic carbon for growth.[1] This contrasts with autotrophs, such as plantsand algae, which can use energy from sunlight (photoautotrophs) or inorganic...

A heterotroph is an organism that requires organic substrates to get its carbon for growth and development. A heterotroph is known as a consumer in the food chain. Contrast with autotrophs which use...

an autotroph is an organism capable of synthesizing its own food from inorganic substances, using light or chemical energy.