EASY_LOTS OF POINTS I've just done an experiment in which I put one object into three beakers (three of the same object for each of the beakers) with different levels of acidity to record the impacts acidity has on the object.
Which is the independent variable? which is the dependent variable?

Veins have a much lower blood pressure than arteries. which of these prevents backflow of blood in veins? a. pressure applied by the heart b. one–way valves in veins c. thin muscular walls of veins

Consider the activity and specificity of the three enzymes. pepsin is most active in the human and to digest

Which of the following statements is true regarding a basic amino acid? a.) the hydrophilic r group of a basic amino acid will be located on the interior of a protein b.) the positively charged r group of a basic amino acid could bind dna c.) the r group of a basic amino acid would only be able to form covalent bonds with other molecules d.) a basic amino acid would be considered both polar and hydrophobic e.) all of the above