Question

which trait do archaea and bacteria have in common?
no archaea or bacteria can make their own food.
both archaea and bacteria have cells with a nucleus.
all archaea and bacteria are made up of one cell.

Explanation:

1. The first option is incorrect because some archaea and bacteria are autotrophic (e.g., cyanobacteria can perform photosynthesis to make their own food).
2. The second option is incorrect because both archaea and bacteria are prokaryotes, meaning their cells lack a membrane-bound nucleus.
3. The third option is correct: all archaea and bacteria are unicellular (composed of a single cell).

Answer:

All archaea and bacteria are made up of one cell.