In facilitated diffusion, substances move into or out of cells down their concentration gradient through protein channels in the cell membrane. Simple diffusion and facilitated diffusion are similar in that both involve movement down the concentration gradient.
Answer:
the answer is C. the lymph system
B is correct
D is appealing but the electrons spend more time around the oxygen than the hydrogen
Answer:
Ethnicity
Explanation:
<em>The correct answer would be </em><em>ethnicity</em><em>.</em>
<u>By definition, ethnicity refers to the variety of physical and behavioral characteristics that distinguishes one group of people from another group of people. </u>
Individuals or a group of people that shares the same culture and a sense of identity would belong to the same ethnic group while those with dissimilar culture and physical identity would be in different ethnic group.
