The chart shows observations made during a study in an attempt to determine the evolutionary relationships between five organisms. Evolutionary Relationships
Characteristics
Organisms
1 2 3 4 5
backbone х х 0 X X
bony skeleton X х 0 х 0
four limbs Х 0 0 х 0
amniotic egg
х 0 0 0 0
X= present
What primary type of evolutionary data was used to determine the relationships between the organisms?
O anatomy
O biochemistry
O embryology
O paleontology