Answer: The mesosphere starts at 31 miles (50 km) and extends to 53 miles (85 km) high. The top of the mesosphere, called the mesopause, is the coldest part of Earth's atmosphere, with temperatures averaging about minus 130 degrees F (minus 90 C). This layer is hard to study
Explanation: hope this helps please give brainliest!
A or c. I thought technically it was selective breeding but i haven't done genetics in a while to know what it's actually called
C. Channel proteins bind to molecules too large to diffuse into or out of the cell, and allow them to pass.
glucose is been oxidised to produce pyruvic acid and oxygen
