In the separation of air into its gases what do you think is the biggest expense? Explain.

The variability in marine salinity between habitats does not impact the fish living there. select the best answer from the choices provided t f

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

An object becomes electrically charged when: electrons are created in it electrons from it are destroyed electrons are transferred to it protons from it are destroyed protons are created in it