Presentation on theme: "32-3 Primates and Human Origins"— Presentation transcript:
132-3 Primates and Human Origins By Alan NewcombMegan StoneBradley ReddinRegan Gauntt
2Adaptations Binocular Vision Well developed cerebrum Have flat face that enable the primate to merge images providing depth perception and a 3-d veiw of the worldWell developed cerebrumHelps them display complex behaviorsFlexible fingers and toesUsually have five fingers that curl around objectsArms that rotate in broad circlesEnables many primates to run along tree limbs and swing like Tarzan with easeThe thumbThe presence of the thumb helps them hold objects firmly in their hands or in their feet
3Evolutionary HistoryPrimates split into several groups in the early evolutionary historyProsimians : small, nocturnal primates with large eyes adapted for seeing in the dark, many have dog like snoutsAnthropoids: include monkeys, apes, and humansThey are split into two branches
4AnthropoidsNew world monkeys like squirrels and spider monkeys they live almost entirely in treesLong flexible arms to swing branch to branch once again like TarzanThey have a long prehensile tail that can coil tightly around a branch to serve as a fifth handOld World Monkeys such as langurs and macaquesSpend time in trees but lack the prehensile tailGreat apes also called hominoids include orangutans and gorillas share 98% DNA with humans
5Hominoid EvolutionHominoid family includes modern humans that display several distinct evolutionary trends.Bipedal means to have two feetHominid hand evolved an opposable thumb
6Early HominidsAlmost a third of all Hominids have been discovered in the last 20 yearsMost palientolisgest agree that the Hominid fossil record includes at least these genera; Ardipithecus, Paranthropus, Austrlopithecus, Kenyanthropus, and Homo
7AustralopithecusThis group lived from about 4 million to about a million years ago.They were bipedal apes that ate fruit, stayed in trees, and are human ancestors
8ParanthropusThey had huge grinding back teeth with diets including course and fibrous plant foods.They grew to the size of well feed football linebackers
9Early Hominid Evolution Like the evolution other mammalian groups, a series of complex adaptive radiations produced a large number of species whose relationships are difficult to determineThe hominid fossil record dated back nearly 7 million years ago
10The Genus homo Homo Habilis means “handy man” Homo Habilis was the first of several species in our genus to arise in Africa.
11Out of Africa, but when? And who? Researchers agree that our genus originated in Africa. But they do not know when the hominids first left Africa or originated.
12Modern homo sapiensThere are two groups of hominids. One is homo neanderthalensis and homo sapiens.They thinl homo neanderthalensis died out 30,000 years ago.50,000 years ago, homo sapiens act like we do today
13Questions What are the two types of homos? What are two types of primates?What are the two differences in the types of primates?What are the two types of adaptations of primates?