Question

what organelle does letter d represent?
○ mitochondria
○ chloroplast
○ nucleus
○ vacuole

Explanation:

In eukaryotic cells, mitochondria are rod - shaped organelles with a double - membrane structure (like the structure labeled D). Chloroplasts are for photosynthesis (green, not D), nucleus is the control center (F - like), vacuoles are storage (not D's shape). So D is mitochondria.

Answer:

A. mitochondria