Which nutrient is a cofactor in antioxidant enzyme systems?

Which statement best describes a keystone species? o a. it has littlelmenetic variation. it has an extremely high population. 0 b. 0 c. it remains unaffected by all environmental changes. od. it has a strong influence on the ecosystem. 0 e. it's the first species to populate a new ecosystem.

The negative impacts of nonnative species generally outweigh the positive impacts

Which atmospheric later is where earths northern and southern lights occur