Phospholipid tails are made of glycerol and a phosphate group. true false

False. A phospholipid consists of glycerol bonded to 2 fatty acids, which are often referred to as the "tails" and a "head" which contains a phosphate group.

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The person who utilize the progression principle will keep adding the difficulty of the exercise that he's doing, while the person who does not, will only stay stagnant.  the person that utilize progression principle, will get a stronger endurance because now his body is conditioned to do harsher routines.{the answer was already on verified)