Organelles with Double Membranes Steps:

• Recall that double-membrane organelles in eukaryotic cells include the nucleus, mitochondria, and chloroplasts (in plants).
• Note that vacuoles are surrounded by a single membrane.
• Examine each option to find the one listing only double-membrane organelles.
• Select the option matching nucleus, mitochondria, and chloroplasts.

Why B is correct:

• The nucleus, mitochondria, and chloroplasts each have a double membrane structure, as defined in cell biology for enclosing genetic material and enabling energy production or photosynthesis.

Why the others are wrong:

• A: Vacuoles have a single membrane, not double.
• C: Vacuoles have a single membrane, not double.
• D: Vacuoles have a single membrane, not double.

Final answer: B