Final answer:
Chloroplasts are organelles in plants and algae where photosynthesis occurs, containing their own DNA and ribosomes.
Explanation:
Chloroplasts are organelles found in plants and algae where photosynthesis takes place. They have a double membrane, with the inner membrane forming thylakoids that are organized into grana. Chloroplasts contain their own DNA and ribosomes, enabling them to replicate and function semi-autonomously.
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