A dependent variable is

a. directly changed by the experimenter.

b. manipulated by changes to the independent variable.

c. a variable that is kept constant.

d. a variable that is used as a control

Charles Darwin spent over 20 years developing his theory of natural selection. True or false?

What would most likely happen when a metal is heated? A. It will melt. B. It will solidify. C. Its temperature will decrease. D. Its particles will move slower.

What is the function of the structural elements of a virus? What is the function of the structural elements of a virus? To package and protect the viral genome To provide a source of energy for the virus To use all of the cell proteins

Which component of the biosphere is an example of inorganic matter? A Carbohydrates B. Sugars C. Minerals D. Proteins

Will the natural resources on our planet last forever? Why or why not?

Peter has just had surgery and is on nasogastric suction. this involves removing fluids from the stomach through a tube. the new intern does the suction a little too enthusiastically and removes too much hcl. what do you think will happen to the ph?

The 68-year-old client states, "i have been taking aspirin on occasion for my arthritis for many years but notice that it takes longer for it to start working now." what is the best response by the nurse?

The mid-ocean ridge is formed by the long accumulation of ocean floor sediments and millions of years of their subsequent folding and faulting. a. True b. False

What is found in all adult exhinoderms

What is meant by the following statement? The cell membrane is said to be fluid.