Questions 1-50 are all multiple choice, each worth two points. Isotopes of atoms can be expected to a. have similar properties in chemical reactions. The depletion of nutrients in the oceans provided selective pressure for single cells to cooperate and form multicellular organisms. The earliest living cells were dependent on oxygen for respiration. Relative to the length of time living organisms have existed on earth, human types have been around an extremely short period of time.
Prokaryotes appear to have existed before the eukaryotes.
The chemical bond requiring the most energy to break is a. Therefore, one liter of 0.001 M HCl would be expected to have a pH of a. 3. COOH c. CH 3 CH 2 COOH d. Hydrophobic interactions a. are stronger than covalent bonds. The fundamental process that underlies the synthesis of biological macromolecules is the a. oxidation reaction.