7 - bipedalism Flashcards
Dunsworth (no obstetrical dilemma) and Hunt (A. afarensis) measured against …
LOVEJOY (“the nuclear family and provision hypothesis”)
Post-Natal growth.
Chimps more n humans
Why children not born complete?
mother metabolism stressed.
Humans are altrical?
Yes, they are born needing attention.
7-6 MYA Chad
Sahelanthropus tchadensies
Sahel femur
very curved therefore climbing or quadruped – or from another animal?
extended toe bone =
means biped (Ardipithecus)
Which hominin disrupts climbing & biped combination radically?
Sivapithecus
MRCA probably multi- ____
grade (arboreal / biped)
Viola push-back against Lovejoy’s theory that pair bonding creates nuclear families?
No. That would reduce dimorphism. And we are biologically dimorphic / polygynous.
More dimorphism more
drama. Baboons low dimorphism more peaceful.
Strontium “Sr” (trace element) in water also found in …
BONES … therefore, different levels of Sr means specimen MOVED.
Strontium (Sr) in Australopiths indicate
Patrilocality
