Answer: D) the central and peripheral nervous systems
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Answer:
c is just wrong because that is not how evolution works evolution is a small change in the DNA that takes a long time through many many generations not just as you or an organism get older and smarter you are not evolving
The answer is C, loss of biodiversity due to an invasive species
4 daughter cells
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Hormones -- such as melatonin and cortisol; the former signals the body to go to bed, while the latter signals for the sleeping person to wake up -- are created by physiological changes.