Nutrients move through ecosystems in different way. which nutrient cycles through organisms, rivers,

Microorganisms aren’t all decomposers; in fact, many act as producers or primary consumers in an ecosystem. how do microorganisms that act as producers benefit the rest of an ecosystem in terms of energy transfer? what about microorganisms that act as primary consumers?

How is the carbon cycle related to global warming ?

Pulmonary arteries carry highly oxygenated blood. true or false?