Given that the recommended daily allowance of the trace metal magnesium is 410mg/day for males, this quantity when expressed in μg/day would be this:
410mg x 1000 μg would be 410000 μg/day <span>4.1x<span>10^5 </span></span>μg/day.
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I don't know the answer sorry
A is the answer according to my notes
a group of single-celled eukaryotes.
I think the answer is D. Both a and b