The phospholipid molecule is both hydrophilic and hydrophobic which allows it to organize into a bilayer with the hydrophobic tales tucked away and the hydrophilic head exterior. This bilayer is also semipermeable allowing some small molecules in for the cell to use
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systems, i.e. circulatory system
organism
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3) bb
4) it is recessive because it skips generations and there are carriers. the parents don't have it, but they pass it on to their offspring
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