If a scientist is experimenting with fifty of the same kind of organisms, how many should be controlled and how many should he use to test the variable?

enzyme speed up the reactions

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explanation:

after making a punnet square using bv bv bv bv you will find that the ratio will be 9: 7 or a 128.6% probability.

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affects the water bodies: excessive use of fertilizers causes eutrophication. the fertilizers which are used on plants affect the quality of land on which it is used, further causing erosion of soil. the fertilizers used on plants contain harmful chemical fumes which affect the environment.