I can help with one but not 3... The Cell membrane can be used to help protect the inner parts of the cell such as the, mitochondria, cytoplasm, endoplasmic reticulum. (List more).
You didn't give us any options but maybe it's <span>Messenger </span><span>RNA? </span>
Build up of FRICTION has been used to try to predict earthquakes, should be the write answer.
