Why do phospholipids form a bilayer in water?
a. the phosphate portions repel each other.
b. the hydrophilic and hydrophobic parts attract each other.
c. the phosphate portions attract water, and the lipid portions repel water.
d. the lipid portions attract water, and the phosphate portions repel water.

c

Explanation of

When phospholipids are mixed with water, they spontaneously rearrange themselves to form the lowest free-energy configuration. This means that the hydrophobic regions find ways to remove themselves from water, while the hydrophilic regions interact with water. The resulting structure is called a lipid bilayer.

where is the

the "dirty dozen" chemicals banned in an international treaty are formally known as persistent organic pollutants, or pops. the united nations environment program provided this background on what they are and what they can do to humans and wildlife.

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