Which process only exists because humans changed the carbon cycle? * A (plants taking in CO2 during photosynthesis)
B (animals respiring/exhaling greenhouse gasses)
C (fossil fuel combustion to make energy)
D (plants dying and decomposing in the soil)
E (buried remains of once-living things turning to fossil fuels)

Been sitting here trying to take this test and don't know this answer! place the events of a feedback mechanism associated with body temperature in the correct order. ·nerve cells send message from skin to the brain ·body returned to normal temperature around 98.6 degrees f ·temperatures regulation center in the brain sends out signals ·body temperature exceeds 98.6 degrees f ·sweat glands throughout the body activate to cool off skin surface it is a 1 through 5 question in biology!