Question

select the correct answer.
nelly was reading about ecological pesticides. she found a website that said that skeletons of some organisms settle as sediments in the ocean. they are then used as pesticides because they are abrasive against pests. which organism is the article discussing?
a. dinoflagellates
b. diatoms
c. green algae
d. euglenoids
e. amoeba

Explanation:

Diatoms have cell walls (frustules) made of silica, which are abrasive. Their skeletons settle as sediments and can be used in pesticides for their abrasive effect on pests. Dinoflagellates, green algae, euglenoids, and amoeba don't have such abrasive skeletal structures suitable for pesticide use in this way.

Answer:

B. diatoms