Radiolarians have a cell wall made of
.....
According to
https://microbewiki.kenyon.edu/index.php/Radiolaria
"
Radiolaria are unicellular organisms. They have mineral skeletons (tests) that are composed
of silica. The tests are formed through the absorption of silicon
compounds. This skeleton is covered with cytoplasm, which is withdrawn
if the organism is disturbed."
There cell wall is made of according to another website
...
"Radiolaria....have cell walls made up of thick cellulose walls"
Hope this helps:)
@SamSamySamantha
