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52962
Vertebrate Zoology
Description
Vertebrate Zoology Mind Map on Vertebrate Zoology, created by Litty Carter on 22/04/2013.
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vertebrate zoology
vertebrate zoology
Mind Map by
Litty Carter
, updated more than 1 year ago
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Created by
Litty Carter
over 11 years ago
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Resource summary
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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