Which statement best describes the presence of mitochondria in plant and animal cells?

• A. Mitochondria are present only in animal cells; plant cells rely exclusively on chloroplasts for ATP production.
• B. Mitochondria are present in both plant and animal cells and are a major site of ATP production via cellular respiration.
• C. Mitochondria are present only in plant cells; animal cells generate ATP only in the cytosol.
• D. Mitochondria are absent from both plant and animal cells and are found only in prokaryotes.

Answer: (B)