Traits that have 3 or more phenotypes may be the result of MULTIPLE alleles, I believe. Hope that helps!
<span>it can form four covalent bonds it forms very strong bonds</span>
Answer:
These impacts include compaction, loss of soil structure, nutrient degradation, and soil salinity. The effects of soil erosion go beyond the loss of fertile land. It has led to increased pollution and sedimentation in streams and rivers, clogging these waterways and causing declines in fish and other species.