Geologic Time Scale.Scientists decide when an era begins<span> and </span>ends<span>, due </span>to<span> mass extinction. ...</span>Scientists determine<span> when drastic changes </span>are<span> made by the fossil record, which shows earths past organisms that have become extinct.</span>
C Because the fact That best adapted animals in a population survive is part of natural selection
The relationship between cats and mice could be best described as 'Predator-Prey'.
