Base your answers to questions 1 and 2 on the diagram below and on your knowledge of biology.
Letters A through ) represent different species of organisms. The vertical distances between the dotted lines
represent long periods of time in which major environmental changes occurred.
F
C
G
H
-
B
E
B
Time
D
В
20
A
В
1. Do all the animals represented by these letters have a common ancestor? Use information from the
diagram to explain your answer.
2. Which animal (letter) became extinct the earliest? Use information from the diagram to explain your
answer.