phytoplankton are microscopic organisms that live in watery environments, both salty and fresh. Some phytoplankton is bacteria, some are protists, and most are single-celled plants.
e.g. Chlorella, Chlamydomonas, Spirogyra, and Diatoms.
Phytoplanktons are producers of ___ .
What is the importance of phytoplankton?