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52962
Vertebrate Zoology
Descrição
Vertebrate Zoology Mapa Mental sobre Vertebrate Zoology, criado por Litty Carter em 22-04-2013.
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vertebrate zoology
vertebrate zoology
Mapa Mental por
Litty Carter
, atualizado more than 1 year ago
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Criado por
Litty Carter
mais de 11 anos atrás
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Resumo de Recurso
Vertebrate Zoology
ZOOLOGY
"The branch of biology that deals with animals and animal life. Includes: Structure, behaviour, physiology, development and classification of animals
NATURAL SELECTION
Organisms produce more offspring than ever survive
Organisms within species vary
Any variation which gives an individual a survival advantage will be passed down to the next generation (if trait is heritable)
Some die because those with survival advantage outcompete them
EVOLUTIONARY MECHANISMS
Mutation
Gene Flow
Movement of genes between populationa
Genetic Drift
Random changes in gene frequencies within a population
Recombination
Speed of Evolution
GRADUAL (Darwin and John Maynard Smith)
Small changes within species (microevolution)
evolution of new species, families etc. (macroevolution)
RAPID (Gould and Mayr)
PUNCTUATIONISTS
Species show little or no evolutionary change throughout history
When speciation does occur, it happens over a short period of time
Gradualism is rare in fossil records: intermediate forms are rare i.e. missing links are indeed missing
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