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your answer is A
</span>Auxins hormones are used <span>used to </span><span>prevent premature fruit drop, so Ronald should spray the trees with this solution.
On the other hand, abscisic acid stimulated slows the </span>plant growth .
I think the correct answer from the choices listed above is the third option. All of the following are common water pollutants that can be damaging to the environment except <span>carbon dioxide from combustion. This pollutant would go directly to the atmosphere and not to the waters. Hope this answers the question.</span>
Cell membrane and the nuclear membrane