When you are carrying a microscope, which of the actions listed below should you do? Check all that apply. Hold the arm with both hands. Put one hand under the base. Put both hands under the base. Hold the arm with your other hand.

put one hand under the base and hold arm with your other hand

Explanation:

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in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".