B Researchers discover that a species of maple tree cannot survive and complete a lifecycle without tiny amounts of fluorine. For this tree, fluorine is a(n) O a) micronutrient b b) essential micronutrient

B

Researchers discover that a species of maple tree cannot survive and complete a
lifecycle without tiny amounts of fluorine. For this tree, fluorine is a(n)
O a) micronutrient
b b) essential micronutrient
c) macronutrient
d) amino acid

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