Exam (elaborations)
BIO 101 Ch. 2 NVCC Study Guide Exam Questions with Correct Answers
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About 20-25% of the 92 natural elements are known to be essential to life. Which four of these elements make up approximately 96% of living matter? A) carbon, sodium, hydrogen, nitrogen B) carbon, oxygen, phosphorus, hydrogen C) oxygen, hydrogen, calcium, nitrogen D) carbon, hydrogen, nitrogen,...
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