Which of the following statements is true about the carbon cycle?
carbon molecules enter the atmosphere through the process of respiration.
the carbon cycle describes how carbon moves
between living and nonliving things in the environment.
the amount of co2 in the atmosphere is increasing.
all of the above

Let the ed50 of a recreational drug be defined as the amount required for 50% of a test group to feel high or get a buzz. if the ed50 value of ethanol is 470 mg/kg body mass, what dose would a 70 kg party goer need to quickly consume in order to have a 50% chance of getting a buzz? 235 mg 470 mg 32,900 mg 35,000,000 mg