Biology waec 1993

Which of the following mineral salts is a trace element?

a

Zinc

b

CArbon

c

Hydrogen

d

Potassium

e

Calcium

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a

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Discussions (4)

Tinoboss
4 years ago
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trace element

Laura59
1 year ago

Trace elements are micronutrients

daniella0240
3 years ago

please what are trace elements 😳

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