The Southern Hemisphere experiences the coldest seasonal weather during what portion of the Earth's orbit? A. When the orbital speed of the Earth is the fastest.

B. During the time when the Earth passes Jupiter

C. When the South Pole tilts away from the Sun.

D. During the time when both hemispheres have a full moon.

Molecules like glucose and amino acids are not lipid soluble, so cannot cross the cell membrane by simple diffusion. instead, they are shuttled across by carrier proteins in the membrane from high to low concentration. does this process require energy from the cell? this is an example of what type of molecular movement?