Biology 101 Test 1 (Full Study Guide Correct 100%

About 25 of the 92 natural elements are known to be essential to life. Which 4 of these 25 make of 96% of living matter? - ANSWERcarbon, hydrogen, nitrogen, oxygen Knowing just the whole number of an element allows inferences about which of the following? - ANSWERthe number of protons plus neutrons in the element When two atoms have the same level of attraction for electrons, the type of interaction between these two atoms can be described as - ANSWERnonpolar covalent bond What is the difference between covalent bonds and ionic bonds? - ANSWERCovalent bonds involve the sharing of electrons between atoms; ionic bonds involve the electrical attraction between atoms of opposite charge The element present in all organic molecules is - ANSWERcarbon A carbon atom is most likely to form which of the following bonds with other atoms? - ANSWERCovalent bonds