The warmer the environment is and the closer an environment is to the equator, the higher the biodiversity of the environment. Based on these observations, which of these environments has the greatest biodiversity?
A. tundra
B. desert
c. tropical rainforest
D. grasslands

Which of the following systems in absorbing oxygen and releases carbon dioxide

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

What is the farthest destination to date for a human spaceflight mission?