Answer:
D
Explanation:
Facilitated diffusion is a form of passive transport hence no energy is required by the cell. This means that while the molecules are moving down a concentration gradient – line normal diffusion – the movement of the molecules needs to be facilitated (in this case by a transmembrane protein) either because the molecule is polar and can't pass through the hydrophobic region of the cell membrane, or the molecule is too big to passively pass through the small natural pores of the cell membrane.
No. The natural selection is when the best suit fits survive. Therefore is not the idea that as an environment changes.
Answer:
A mass
Explanation:
I learned it in 8th grade.
Answer:
Sensing danger and sweating
