A group of researchers investigated the effects of a drug called Pressure Drop Y on lowering blood pressure in a
group of men between the ages of 50 and 70 years old. The researchers did the following experiment and
obtained the indicated results: One group of 150 men took a tablet containing Pressure Drop Y for 3 weeks – 95
of these men experienced decreased blood pressure by at least 10%. Another group of 150 men were given a
tablet with no added Pressure Drop Y for 3 weeks – 10 of these men experienced decreased their blood pressure
by 10%. What is the dependent variable in this experiment?
Question 1 options:
Which macromolecule is the primary energy source for organisms?
You observe a cell under a microscope and don't see a well-defined nucleus. What type of cell is this?
What is the atomic number of an element with 9 protons, 10 neutrons and 9 electrons?