Which is the site of anaerobic respiration in a cell. a)chloroplast
b)cytoplasm
c)nucleus
d)vacuole

The friction red blood cells encounter when moving past each other. cardiac output: the amount of friction blood encounters during flow through blood vessels. blood pressure: the force of the blood against the vessel wall. blood viscosity: the volume of blood pumped out by one ventricle each minute.

Which of the following is a macronutrient? carbohydrates lipids amino acids all of the above

For a comparative or experimental investigation, scientists often make a testable about a scientific question, and then they test it in the investigation. a. control b. hypothesis c. procedure d. system