The _______ is the small opening between the vagina and the uterus.

Which is the independent variable for the above experiment?     

Which of the follow methods of birth control is the most effective when used correctly?

If a cell is in a hypertonic solution, what will happen?

Which of these is NOT used to adjust the level of light for a compound microscope?

What was the control group for activity 2 (the one with the different sucrose solutions in the dialysis bags)?

The resting heart rate of someone who exercises regularly is likely to be lower than someone who exercises infrequently.

For the following hypothesis, what is the independent variable? “If a person takes a keratin supplement, their nails will grow faster”

The process by which many types of molecules (e.g proteins, dyes, DNA) could be separated according to size and charge is called:

For activity 2 (the one with the different sucrose solutions in the dialysis tubing), what was the independent variable?