There are many answer for it be ore clearer
The presence of drugs or chemicals in an organism's environment can also influence gene expression in the organism. Cyclops fish are a dramatic example of the way in which an environmental chemical can affect development.
Answer:
Because people need to know what the water is like around them
Explanation:
If they don’t know they could get really sick and that’s not good
<span>Nutrients enter the bloodstream during the process of digestion, absorption through osmosis. <span>
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