PLEASE ANSWER ITS DUE IN 20 MINUTES Explain the role of carbon in photosynthesis and cellular respiration. Make sure to identify where each process occurs (organelle) as well as the inputs and outputs of each process.

How is an environment able to support different varieties of organisms?

Which of the following is not a way in which a vascular plant's xylem and phloem are similar?

Match the following terms describing electrical events with the correct phases of the cardiac cycle. the ventricular muscle cells depolarize at the start of this phase. during this phase, na+ entry through the funny channels causes the pacemaker potential of sa nodal cells to gradually become less negative until it reaches threshold. the ventricular muscle cells repolarize right before this phase. the cytosolic concentration of calcium in the contractile cells of the ventricle is highest during this phase. a. isovolumetric relaxation b. ventricular ejection c. isovolumetric contraction d. ventricular filling