Which item is made from a synthetic material?

1) these are barrel shaped microtubules in most animal cells, that organize the spindles during cell division

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

What are the first three quantum numbers for the electrons located in subshell 2s?