A Diatom Has A Cell Wall Made Of. A diatom does have a cell wall because even though it is common as an animal cell, diatoms are also found as plant cells in which all have cell walls. Diatoms have cell walls made of silica, each species has a distinct pattern of tiny holes in the cell wall (frustule) through which they absorb nutrients and get rid of waste.
Dinoflagellates are found in both.
These walls, called frustules, take many forms, some quite beautiful and ornate. Diatoms have cell walls made of silica, each species has a distinct pattern of tiny holes in the cell wall (frustule) through which they absorb nutrients and get rid of waste. What is the cell wall made of? The patterns on the diatom cell walls dinoflagellates are unicellular algae with armor made of cellulose and flagella that cause them to spin as they swim.