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BIO 100 EXAM 1 - MASTERING BIOLOGY QUESTIONS WITH CORRECT ASWERS Elements - ....ANSWER ...-__________ are substances that CANNOT be broken down into other substances by chemical reactions Which four elements make up the bulk of living cells? - ....ANSWER ...-oxygen, carbon, hydrogen, and nitrogen Atomic number - ....ANSWER ...-...is the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table. Atomic Weight - ....ANSWER ...-The number of protons plus neutrons in an atom, represented as an average of all naturally occurring forms of the element, is known as... Trace elements - ....ANSWER ...-... also called micronutrients, are any chemical element required by living organisms in minuscule amounts, but cells require them to survive. Nitrogen - ....ANSWER ...-...is one of the four elements that make up 96.3% of living cells. Calcium - ....ANSWER ...-...is one of the seven elements that make up a small fraction, approximately 3.7%, of living cells. ...COPYRIGHT ©️ 2025, ALL RIGHTS RESERVED..... 100% PASS RATE 1