ANT131,8 - Anagenesis Evolution of a species in another...

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18:59 Homologies Similar features in two related organism because of a shared  evolutionary history Analogies Similarity in traits due to similar use, not shared ancestry.  Result of convergent/parallel evolution Which homologous traits? Ancestral: Traits inherited from a remote ancestor Derived: Characteristics modified from an ancestral condition What kind of tree? Phylogenetic Temporal component Ancestor – Descendant links Cladogram Derived traits in one dimension Biological Species (Ernst Mayr 1970) A group of organisms that interbreed in nature and are reproductively  isolated  from  other organisms. Speciation Process by which new species evolve from prior species. Process of Speciation Cladogenesis: Evolution through the branching of a species of lineage
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Unformatted text preview: Anagenesis: Evolution of a species in another over a period of time. Primate Characteristics Anatomy Hands & Feet Prehensile Five Digits Nails replace claws Opposable thumb Tactile pads on digits Hind Limbs & Torso Erect Posture (Torso) Flexible limbs (retain clavicle) Hind Limb dominant Eyes Eyes Rotated forward Binocular vision Stereoscopic vision Many perceive color Eye socket enclosed by bone Brain Encephalization Increased volume of the neocortex Greater convolutions (ridges and fissures) Greater surface area and higher cognitive function Diet and dentition Lack dietary specialization and tend to eat a wide variety of foods. Generalized dentition. Life History Longer Gestation. Fewer offspring Delayed maturation Extension of life span Behavior Complex social environment Reliance on learned, flexible behavior....
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ANT131,8 - Anagenesis Evolution of a species in another...

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