The kind of sugar our bodies use as fuel for chemical reactions is

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.

The cluster of developing cells from conception until birth is called an

What is the membrane that sheath of schwann cell containing cytoplasm and nucleus that encloses myelin