What reactants from normal respiration are missing in this new form of respiration what is the problem with anaerobic respiration in humans and how does the body solve it which type of anaerobic respiration will produce bubbles of gas-lactic acid, or alcoholic

Which of the following must be true for a fossil organism to be useful as an index fossil? a. the fossil organism must be widespread geographically. b. the fossil organism must be abundant. c. the fossil organism must be limited to a short span of geologic time. d. all of the above.