BIOLOGY 1M03 Lecture Notes - Lecture 7: Paranthropus, Premolar, Symbolic Culture
11 Aug 2018
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Practise question- t(cid:449)o (cid:455)ea(cid:396)s ago, be(cid:374) had a (cid:862)(cid:271)(cid:396)a(cid:272)hial (cid:272)left (cid:272)(cid:455)st(cid:863) (cid:396)e(cid:373)o(cid:448)ed f(cid:396)o(cid:373) his (cid:374)e(cid:272)k. this (cid:272)(cid:455)st (cid:449)as formed from tissue that normally is reabsorbed during human embryogenesis, but which in fish normally develops into a gill. Gorillas: harems, usually one silverback with many females with offspring; infanticide. The first evidence for adaptations to suspensory locomotion is observed in hominoid fossils from the miocene (23-5 mya) Some miocene hominoids were quadrapedal and frugivorous but lacked tails (similar to modern apes: these fossils have been found over much of africa and eurasia. Could be a response to increased dependence of offspring. Wh(cid:455) did(cid:374)"t (cid:271)ipedalis(cid:373) e(cid:448)ol(cid:448)e (cid:373)o(cid:396)e f(cid:396)e(cid:395)ue(cid:374)tl(cid:455) i(cid:374) othe(cid:396) li(cid:374)eages. Our ancestors had suspensory locomotion which is uncommon. Possibly, this ancestral feature pre-disposed the ape lineage to evolve bipedalism. Loss of tails; restructuring of muscles; strengthening of pelvic floor. Fully bipedal: parabolic dental arcade, thick molar enamel, reduced canine teeth, large molars relative to other teeth.
