How many chromosomes do daughter cells have after mitosis? A.
none
B.
twice as many as the parent cell
C.
half as many as the parent cell
D.
the same number as the parent cell

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.