Where are roundworms useful in an ecosystem?
killing animals soils fields bacteria eating plants wetland food alveoli
A B C D E F G H
Also, nematoda and rotifera are important groups contributing to soils.
Roundworms make important contributions to soils.
Where are roundworms useful in an ecosystem? (A) killing animals (B) soils (C) fields (D) bacteria (E) eating plants (F) wetland (G) food (H) alveoli