Organic compounds are made from: a. oxygen, carbon, and hydrogen b. carbon and hydrogen c. carbon and oxygen d. carbon only

Sydney drew a flow chart to illustrate the nitrogen cycle.which labels best complete the flow chart? x: producers undergo photosynthesis.y: nitrogen compounds are released into the air.x: nitrogen compounds are released into the air.y: producers undergo photosynthesis.x: free nitrogen is in the atmosphere.y: producers absorb nitrogen compounds through their roots.x: producers absorb nitrogen compounds through their roots.y: free nitrogen is in the atmosphere.

Energy derived from hot rocks and fluids beneath the earth’s surface is

What are genotypes? what are phenotypes?