Which of the following is correct about chrysophytes?I. Found in fresh and marine waterII. Microscopic plankton III. Cell walls are embedded with  CaCO3IV. Most of them are photosynthetic

Chrysophytes cell wall is made up of silica not calcium carbonate. Chrysophytes are found in fresh water as well as in marine environments. They are microscopic and float passively in water currents (plankton).Most of them are photosynthetic.