1. natural selection acts on existing traits because you can not evolve into something you didn't have
2. original structures evolve to accomplish new function in order to survive
The average height of the oceans surface between high and low tides is called the sea level. It is important to know this measurement because with this it is possible that we can calculate the height of anything on the land. Also, we can <span> calculate the height of anything on the land. Also, we can be able to determine whether the oceans are falling or rising through time.
So the answer is </span><span>Sea level </span>
Answer:
which of the following???????
Answer:
The damage to ozone layer is done by halogens such as Chlorine and Bromine.
Nucleic acid is the answer for this problem
