D. In a regimen of two to four drugs
Answer:
Genetic variations that alter gene activity or protein function can introduce different traits in an organism. If a trait is advantageous and helps the individual survive and reproduce, the genetic variation is more likely to be passed to the next generation (a process known as natural selection
Explanation:
<span>Only about 75% of water is fresh and suitable for human use.
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Answer:
all of it because it is weird
Explanation: