Average Temperature of Layers Unknown Layer Average Temperature
(°C)
A 4,500
B 1,300 to 2,500
C 5,000
D 0 to 1,300

Which layer is most likely the mantle?
Layer A
Layer B
Layer C
Layer D

he forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. of the four descendants shown, which species most likely appeared earliest in evolutionary history?