During metabolism, the complete breakdown of one molecule of glucose results in a maximum yield of 38 molecules of
adp
atp.
eliminate
gtp.
nadh

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.