what are diatoms and desmids
Answered by The Community. Making the world better, one answer at a time. Diatoms are stramenophila algae, their cell wall is composed of silica and their chloroplasts are yellowish-brown. Desmids are green algae, their cell wall is composed of cellulose and pectins (like plants), and their chloroplasts are green.iatoms are stramenophila algae, their cell wall is composed of silica and their chloroplasts are yellowish-brown.