A/an blank exists when different concentrations of a substance exist on either side of a membrane?

4. how does a phospholipid behave in water? the phosphate head does not mix with water; the fatty acid tails do. the phosphate head and the fatty acid tails mix with water. the phosphate head and the fatty acid tails do not mix with water. the phosphate head mixes with water; the fatty acid tails do not.

Why does bubbling occur when vinegar mixed with baking soda

When listening the levels of orginization in orginisims from the smallest to most complex , which level is just below organs in complexity