Question

you isolate an organism with two unequal flagella (one with hairs) that is encased in a shell made of silica. the group this organism most likely belongs to is the
rhizarians.
stramenopiles.
radiolarians.
alveolates.
euglenids.

Explanation:

Stramenopiles are characterized by having two unequal flagella, where one has hairs, and some stramenopiles such as diatoms have a silica - based shell. Rhizarians, radiolarians, alveolates, and euglenids do not have these combined characteristics.

Answer:

B. stramenopiles