Cacti are plants that live in extremely dry environments. Unlike most other plants, cacti do not have regular leaves, but instead, have spines. They do have green stems. How would the lack of regular leaves help cacti survive in their environment

Which describes radioactive decay of a substance

Environmental impacts on evolution : mastery test

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.