________ are the most diverse and widespread prokaryotes.

• A. Archaea
• B. Protists
• C. Bacteria
• D. Eukarya

Answer: (C)

Prokaryotes lack a true nucleus, and among them, bacteria are the most diverse and widely distributed. They occupy virtually every habitat on Earth—soil, water, air, and the bodies of other organisms, including inside humans. This vast range comes from their incredible metabolic versatility: some use sunlight to make energy, others harvest energy from inorganic compounds, and many perform decomposition and nutrient cycling in countless environments. Their rapid reproduction by binary fission and the ability to exchange genes horizontally allow quick adaptation and the emergence of new traits, fueling ongoing diversity. Archaea are also prokaryotes, often in extreme or unusual environments, but overall they are less diverse and widespread than bacteria. Protists and other eukaryotes, on the other hand, have membrane-bound nuclei and are not prokaryotes. That's why bacteria best fit the description of the most diverse and widespread prokaryotes.