George designed an experiment to determine the number of calories consumed daily in the average American diet. The procedure he used for his experiment is shown below. Find 100 volunteers to record everything they eat for a week Ask volunteers what their favorite dessert is Collect volunteers' records For each volunteer, calculate the total number of calories taken in during the week Divide each volunteer's total calorie count by seven and then average the 100 participants' daily calorie consumption Which step in George's experimental procedure is unnecessary?

Body systems are not completely independent they integrate and work together describe one example of the integration between body systems

Which of the following describes a negative feedback loop? when the heart rate is too high, the body sends hormones that continually increase the heart rate higher. when a pregnant woman is in labor, the body sends hormones that increase the intensity of contractions, which then increases the secretion of the same hormones. when blood sugar is too low, the body sends hormones that raise blood sugar until it reaches a typical level and hormone secretion slows. when a person is jogging, the body sends hormones that continually decrease the rate of oxygen supply to the legs.

Which of these is true for bacteria because they are prokaryotic cells? a. they can engulf body cells in order to make memory cells. b. they must invade viruses in order to reproduce. c. they are much larger than eukaryotic body cells. d. they can reproduce on their own outside of other cells.