Many chlorophytes are unicellular, but others are bigger and more complex. The fact that increased size and complexity evolved in different ways indicates the chlorophyte group contained extensive genetic variability.
Green algae are known as chlorophytes, and as their name suggests, the chlorophyll in the thylakoid gives them their green color. They also include other pigments including xanthophyll and beta-carotene. They can be unicellular or multicellular depending on the species.
Chlorophyta converts sunlight to starch that is stored in cells as a food reserve. Because of their ability to photosynthesize, chlorophytes are among the ecosystem's most significant producers. As a byproduct of photosynthesis, they are a significant supply of starch and oxygen. Many heterotrophs eat them as food. Numerous chlorophytes interact symbiotically with other types of species.
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