You are examining a saltwater sample and see a single-celled organism with a cell wall constructed of two pieces,with the top piece overlapping the bottom piece.The cell wall is impregnated with silica and has an intricate pattern.It is most likely that you are looking at a
A) red alga.
B) radiolarian.
C) diatom.
D) euglenid.
E) dinoflagellate.

Question

Quizplus · Accepted Answer

Diatoms are single-celled organisms that have cell walls made of two overlapping pieces called frustules. These frustules are made of silica and have intricate patterns. The other options (red alga, radiolarian, euglenid, dinoflagellate) either do not have cell walls made of silica or do not have a two-piece cell wall with overlapping pieces.

You Are Examining a Saltwater Sample and See a Single-Celled