Madison is looking at a cell under the microscope. the organism has only one cell, and it has a nucleus and membrane bound organelles. it has no cell wall and uses flagella for movement. in which kingdom should this organism be classified?

Protista

Explanation:

The Protist Kingdom is one of the kingdoms of living beings, characterized by eukaryotic, autotroph or heterotroph, and unicellular or multicellular organisms. Protists include protozoa and algae.

The protozoans themselves are very similar organisms to this organism that Madison is observing. Both protozoa and Madison's organism are unicellular beings with a structure that ensures their functioning, performing the same basic tasks as an animal, such as breathing, digesting, circulating, excreting, in some cases even primitive coordination. They have flagella for movement and no cell wall.

your answer is "the 1950's"

the missing space is phylum