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4. Assess the importance of variations to
natural selection. SC.7.L.15.2

Who is better, messi or cristiano, i need this for a chemistry class. asap

It is important to wear proper protective equipment in lab even when not actively performing experiments because accidents can affect any researcher, even one not working on an experiment. select the best answer from the choices provided

Explain which group an element with the electron configuration 1s2 2s2 2p6 3s2 3p6 3d1 4s2 belongs to.