Which organism type includes amoebas and sporozoans?

The organism type that includes amoebas and sporozoans is protozoa. Protozoa are microscopic, single-celled organisms that can be found in a variety of environments, including fresh and salt water, soil, and as parasites in other organisms. These organisms are characterized by their ability to move independently and feed on organic matter, which includes bacteria and other small organisms.

Amoebas, a type of protozoa, are known for their flexible shape and movement through pseudopodia, which are extensions of their cell body. Sporozoans, also a category within protozoa, are characterized by their spore-like stage in their life cycle and are often parasitic. Understanding protozoa is essential in fields such as water treatment and disease control, as some protozoa can be pathogenic to humans and animals.

The other organism types listed have distinct characteristics that separate them from protozoa. Bacteria are prokaryotic microorganisms without a nucleus, viruses require a host to replicate, and fungi are predominantly multicellular eukaryotes that decompose organic material. Recognizing protozoa as a unique group helps in understanding their ecological roles and impacts on health.