One evolutionary trend is that as you move from simpler animals to more complex animals, Systems become more specialized.
A stimulus is the enviromental factor that causes a chang in position or place while a response is the change made caused by the stimulus
Answer:
it results in 2 exact copies of the original dna strand
Explanation:
The dna is unzipped and the two strands are used as templates for the 2 new dna molecules
The answer is dams they protect against flooding