The variation of organisms within an ecosystem is characteristic of which type of diversity

There are six elements that make up most of the human body. which of the following is not one of these six elements?

Buuy which of the following did you include in your response? organs perform specific functions in the body to keep it alive. organelles perform specific functions in cells to keep them alive. done

Which line in the graph above best illustrates an effect of the carbon dioxide level in the blood on breathing rate before, during and after a period of exercise? 1.b,2.c,3.a,4.d