in which many starch grains are concentrated; there are typically no pyrenoids. Since they lack photosynthetic capability, Polytoma species are entirely saprotrophic, obtaining nutrients from decaying organic matter. Some species possess an eyespot apparatus (stigma) in the anterior portion of the leucoplast, but in others this organelle is absent.

Asexual reproduction occurs when the parent cell divides into four zoospores, while in the parent cell wall. Sexual reproduction