The answe is the 4th choice
Answer:
it is w
Explanation:
i have done a similar question
The kind that messes everything up I guess
The answer to the question "When a part rusts is becomes heavier or lighter?" is the rust actually has a tendency to flake off. But as long as the rust is still on the nail, the nail will be heavier. The reason is that you are actually adding an oxygen and hydrogen to the nail.
UGU and UGC both code for cysteine. A change from UGU to UGC would thus be a silent <span>mutation.</span>