Which of the following is NOT a CFC alternative? O a.
a. Hydrofluoroolefins
O b. Carbon tetrachloride
O c. Hydrofluorocarbons
O d. Difluoromethane​

Which of the following is a common response to cell signaling?

What is the most common structure of volcanoes?

Body temperature is tightly regulated in mammals for example when external temperatures drop too much the body of a mammal response by in order to it's core temperature.