Looking at this graph, Robin wondered why there were so few organisms in the deepest part of the ocean. What is one possible explanation you could give her? A: The most sunlight is at the bottom of the ocean.
B: The warmest water is in the bottom of the ocean.
C: The highest pressure is at the bottom of the ocean.
D: The strongest currents are at the bottom of the ocean.

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

Discuss the functions of epithelial connective nerviud and muscular tissues

Which sentence best describes the relationship between chlorophyll and the chloroplast? a.) chlorophyll is a chemical found in a chloroplast. b.) chloroplast is a chemical found in a chlorophyll. c.) both chlorophyll and chloroplasts are found in animals. d.) both chlorophyll and chloroplasts make carbon dioxide.