A genus of non-motile, unicellular green algae. Each cell contains a single, usually cup-shaped, chloroplast. Cells divide to form 2, 4, 8, or 16 daughter cells which resemble the parent cell and are initially enclosed within the parent cell wall. Chlorella is very common in a wide range of aquatic and terrestrial habitats, often colouring small bodies of standing water (e.g. drinking troughs) a pea-soup green.
Subjects: Plant Sciences and Forestry.