Which sentence describes an example of a positive feedback loop? A.
Warm-blooded animals sweat when they get too hot. Sweating is a method by which the body cools itself.
B.
A thermostat regulates temperature by turning a furnace or air conditioner on and off.
C.
When blood flows from a mild cut, blood clots form to prevent excessive bleeding.
D.
As oceans get hotter, they release more CO2, which then increases atmospheric and ocean temperatures.

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 is not a likely outcome after extensive irrigation of dry farmland? useless, unproductive soil salinization of the soil depletion of groundwater nutrient-rich soil

Connection compare and contrast genetic engineering to the process of natural selection. select all statements that are true.