After CO2 is produced by tissues, in what form is most of that carbon transported to the lungs for removal from the body

An enzyme lowers the energy of activation. what does that mean?

Explain why scientists use the word dominant for certain traits.

When it is summer at the south pole, a. the northern hemisphere is tilted toward the sun. b. the southern hemisphere is tilted away from the sun. c. the northern hemisphere is tilted away from the sun. d. both the southern and northern hemispheres are tilted toward the sun.