1)which of these is not a typical shape for a bacterial cell?

a rod
b spiral
c spherical
d all are typical bacterial shapes

2)bacteria divide to produce new cells using which of the following processes?

a)mitosis
b)binary fission
c)meiosis
d)karyogamy

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.