This type of single-celled organism lacks a nucleus and includes species like E. coli and Salmonella.
What is bacteria?
Neither alive nor dead, these tiny entities consist of genetic material wrapped in a protein coat and need a host cell to replicate.
What is a virus?
Yeast and molds belong to this kingdom of organisms, which are crucial for making bread, beer, and penicillin.
What is fungi?
hese single-celled, animal-like protists are known for moving around using flagella, cilia, or pseudopods (false feet).
What are protozoa?
Often called "extremophiles," these ancient, single-celled organisms look like bacteria but have a completely different cell wall structure that allows them to live in boiling hot springs or deep-sea vents.
What is archaea?