sorry in advance if I miss interpreted the question
evaporation, condensation and precipitation
A. Brain stem communicates with and coordinates other parts of the brain
Cell membranes serve as barriers and gatekeepers. They are semi-permeable, which means that some molecules can diffuse across the lipid bilayer but others cannot. Small hydrophobic molecules and gases like oxygen and carbon dioxide cross membranes rapidly.
<span><span>A)global warming.
</span><span>B)a possible ice age.
</span><span>C)decreased biodiversity.
</span><span>D)<span>desertification and erosion.</span></span></span>
