Answer:
Sperm is the componet of a person diet that is enmsentital for perustalsis
Scientist study index fossils so they will get an understanding of what life was like back then.
False. Type B blood has B antigens and anti-A antibodies.
Explanation:
Simple Diffusion across the Cell (Plasma) Membrane The structure of the lipid bilayer allows only small, non-polar substances such as oxygen and carbon dioxide to pass through the cell membrane, down their concentration gradient, by simple diffusion.
