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HUMAN EVOLUTION SC.912.L.15.1 (Identify basic trends in hominid evolution from early ancestors six million years ago to modern humans, including brain size, jaw size, language, and manufactured tools.)
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A.A CLOSER LOOK AT PRIMATES Mammals called primates include Lemurs, monkeys, apes, humans. 300 species of primates living today Evolved from a small tree dwelling, insect eating ancestor 65 million years ago. CHARACTERISTICS: although primates live on the ground, they retain adaptations for living on trees. Example- a)Flexible shoulder joints (swinging). b)Sensitive fingers/nails instead of claws. c)Hands can hang and manipulate food. d)Binocular vision: Eyes in front of the face and the field of vision overlap enhancing depth perception.
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PRIMTES ARE DIVIDED INTO 2 MAJOR GROUPS 1 ST group: Includes lorises, galagos, and lemurs. Lemurs (Madagascar) Lorises (Africa and South Asia) They are mostly nocturnal, tree dwellers and have claws. 2nd group: Includes tarsiers, new world monkeys, old world monkeys, apes and humans. Tarsiers (South East Asia) New Word Monkeys: (Americas) Tree dwellers, prehensile (grasping) tails for swinging. Old World Monkey: Tree dwellers but tails are not prehensile, include baboons, macaques, and mandrills.
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Chimpanzees are biologically the closest relatives of humans; differing in about 5% of their DNA sequence.
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B. EARLY HOMINIDS Mammals that are more closely related to humans than to any other species family are called hominids (family Hominidae, Order Primates). Today, only 1 species of hominids exist: Homo sapiens (modern humans). Earliest man may have lived 6 to 7 million years ago. 2 Important Developments: 1.WALKING UPRIGHT: Australepithecus aferensis provides the oldest evidence of upright posture and BIPEDALISM; walking on 2 feet. Lucy, female, 3.5 feet tall, head the size of a softball was the first to walk on 2 feet. 2. ENLARGED BRAINS: First appeared in East Asia 2.5 million years ago. Large brains found with tools; Homo habilis. Increase in intelligence gave them success in Africa.
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http://www.youtube.com/watch?v=441rRHO Hx5c http://www.youtube.com/watch?v=441rRHO Hx5c EVOLUTION: THE EVOLUTION OF HUMANS DOCUMENTARY 2014..45min http://www.youtube.com/watch?v=Vv3I22jsU Ew NEANDERTHALS..50 min http://www.youtube.com/watch?v=Vv3I22jsU Ew http://www.youtube.com/watch?v=rohhwn11 xeI DECODING NEANDERTHALS..50 min http://www.youtube.com/watch?v=rohhwn11 xeI
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