What is the difference between Homo erectus / Homo ergaster and Homo heidelbergensis in terms of...

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What is the difference between Homo erectus / Homo ergaster andHomo heidelbergensis in terms of brain case (the part of the skullcontaining the brain)?
Do you see any variations about the teeth between Homo erectus/ Homo ergaster and Homo heidelbergensis?
How does Homo erectus / Homo ergaster differ from Homoheidelbergensis in facial terms, including the jaws (and jawprojection)?
Homo heidelbergensis is a species that is consideredto be an evolutionary step closer to us (humans) than Homoerectus/Homo ergaster was. Why do you think this is so?

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THE difference between Homo erectus and Homo heidelbergensis in case of skull are as follows In Homo ergaster Brain average brain size was approximately 860 cubic centimetres and made up about 16 of their body weight Skull had developed a more humanlike shape including a higher more domed cranium or braincase Unlike modern humans the cranium had a moderate postorbital constriction See Answer

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