Roundworms make up the phylum nematoda.
Also, nematoda and rotifera are important groups contributing to soils.
Roundworms make important contributions to soils.
Where are roundworms useful in an ecosystem?
Options:
[1] killing animals
[2] soils
[3] fields
[4] bacteria
[5] eating plants
[6] wetland
[7] food
[8] alveoli