Which of the following would most likely happen if the moose disappeared? A The number of wolves would increase, as they would no longer compete with moose for food resources. B The number of earthworms would decline as the amount of available organic matter would decrease. C The number of beavers would decline as they became the wolves' primary food source. D The number of trees would decline, as moose would no longer fertilize them.

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.