Question

how are archaea and bacteria alike?

both need oxygen to survive.

their genetic material is similar.

their cells are small and lack a nucleus.

to survive, they must live in cold environments

Explanation:

Archaea and bacteria are both prokaryotes. Prokaryotic cells are small and lack a nucleus. Some archaea are anaerobic (do not need oxygen), so the first option is wrong. Archaeal genetic material has differences from bacterial genetic material (e.g., in the RNA polymerase structure in transcription), so the second option is incorrect. Archaea can live in extreme environments like hot springs (thermophiles), not just cold environments, so the fourth option is wrong.

Answer:

Their cells are small and lack a nucleus.