Anis(o) describes which of the following relationships?

• A. Unequal
• B. Equal
• C. Similar
• D. Balanced

Answer: (A)

Anis(o) signals unequal relationships. The prefix comes from the Greek anisos meaning “uneven, not equal,” so it describes differences in size, form, or amount between paired things. For example, anisocytosis refers to red blood cells that vary in size, and anisogamy refers to gametes of different sizes. Because it conveys lack of equality, it best matches the idea of "unequal." Other options would involve prefixes like iso- or homo- for equality or similarity, which are not what anis(o) denotes.