It has two phosppholipid layers that are either hydrophobic and hydrophillic the function is to protect thing from coming in and out
Measure the amount of chemical used, measure the mass before and after
Answer:
The Last Universal Common Ancestor (LUCA) is the most recent common ancestor of all current life on Earth, estimated to have lived some 3.5 to 3.8 billion years ago
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Explanation:
the answer is a it can be used as an energy source by organisms
