Apaleontologist finds a footprint with what looks like an opposable thumb. what type of animal is it most likely from? a. a primate other than a human c. homo habilis b. homo erectus d. australopithecines

the answer is b.  Homo erectus

all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex

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?