Balearic PAU Biology Practice Questions - Balearic Islands PAU Biology Examination - UIB (Biologia 2o Bachillerato UIB 2026) Exam

Which group of chemical elements constitutes over 96% of total living organism mass (primary bioelements)?

Iron, Iodine, Zinc, and Copper Carbon, Hydrogen, Oxygen, Nitrogen, Phosphorus, and Sulfur Sodium, Potassium, Calcium, Magnesium, and Chlorine Silicon, Aluminum, Titanium, and Boron

Correct Answer:

Carbon, Hydrogen, Oxygen, Nitrogen, Phosphorus, and Sulfur

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