Question

A diatom has a cell wall made of _____. silica calcium chitin cellulose

Answer 1

A diatom has a cell wall made of silica.

Step-by-step explanation:

Diatoms are eukaryotic phytoplankton cells known for their silica-containing cell walls (frustales), and are responsible for approximately 20% of total primary productivity globally. Diatom silica is a form of biogenic opal, containing oxygen isotopes and can be used in lacustrine and marine paleoenvironmental studies.

Answer 2

Silica

Step-by-step explanation:

A unique feature of diatom anatomy is that they are surrounded by a cell wall made of silica (hydrated silicon dioxide), called a frustule

Hope this helps!