Hello anyone from USA here?​

What does the process of natural selection involve

What is the mass defect of a mole of nuclei with 1.8 x 10^15 j/mol binding energy?

What method(s) do plants use to obtain nitrogen? select all that apply. absorb it from the atmosphere use bacteria to convert nitrogen to usable form obtain usable nitrogen compounds from the soil absorb nitrogen from water taken in at the roots