Select all of the following that are true about rain that falls on deserts: it soaks deep into parched ground. it runs off the ground. it is evaporated quickly because of dry air. most deserts receive over 30 inches of rain.

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.

How does secondary succession differ from primary succession?

What is usually (but not always) related to the metabolic processes of living organisms in its organic form?