In which reactions of cellular respiration does substrate-level phosphorylation occur?

How do cells grow and reproduce to maintain homeostasis?

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.

Explain what is meant by a river’s load, and describe how the load is carried.