The graph below shows the distance traveled by four cars, A, B, C, and D, over a period of time. Which of the following statements can be concluded from the information on the graph?
A. All cars traveled at least 90 kilometers.
B. All cars traveled at different speeds.
C. All cars traveled for 4 hours.
D. All cars came to a stop, but at different times.

Patricia is told by her physician that her body and brain chemistry have physically adapted to the drug and that she has become dependent on the tranquilizers prescribed for her by another doctor.

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.

Cells destroy body cells infected by a virus or bacteria. killer t t memory t none of the above