Here's why:
* Chloroplasts are the sites of photosynthesis. They contain chlorophyll, which absorbs light energy to convert carbon dioxide and water into sugars.
* Algae are a diverse group of photosynthetic organisms. They can be single-celled (like Chlamydomonas) or multicellular (like seaweed).
* Chlorophytes are a specific group of green algae that are most closely related to land plants. They have chloroplasts that are very similar to those found in plants.
Example:
* Chlamydomonas: A single-celled green alga that has a single chloroplast.
So, while you might think of chloroplasts as being found only in plants, they are also present in single-celled algae!