Pierakstīties
JAMB - Geography (2006 - No. 22)
The primary importance of nitrogen-fixing organisms in the ecosystem is that they?
increase atmospheric nitrogen
enrich the soil
prevent soil erosion
degrade the soil
komentāri (0)
Piesakieties, lai komentētu
Reklāma
Ļaujiet javascript pareizi ielādēt šo lapu
