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31 Cards in this Set

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  • Back
adaptive radiation
the branching out of a population through variation and adaption to occupy many environments
barrier
anything that prevents the spread of organisms to new environments
binomial nomenclature
the system used by scientists in naming organisms
convergent evolution
the process by which organisms of entirely different origin eveolve in a manner that results in certain similarities
corridor
a pathway that allows the spread of a population to new areas
embryology
the study of the early developments of an organism
era
a division of geological time of millions of years duration
evolution
the slow process of change in which organisms arise, change, and even even become extinct over a period of time
fossil
the hardened remains of an animal or plant embedded in rock
homologous
parts of similar orgin and structure but usually differing in function
isolation
the confinement of a population to a certain location due to barriers
kingdom
the largest classification group
sedimentary
rock formed by the settling of minerals in bodies of water
species
a group of organisms exhibiting the same characteristics and freely interbreeding
sweepstakes dispersal
distribution of orgainisms of new areas dispite strong barriers
taxonomy
the science of classification
vestigal
organs that are poorly developed or nonfuctioning
Lamark
would say that child was strong because his father lifted weights
Human vestigal organs
ear muscles, tail vertebrae, and nictitating membranes
Biochemical similarity
similar hormones and enzymes in most mammals
What is the most accurate method of determining age?
measuring the decay of radioactive elements
What is the order of classification of animals from the least specific to the most?
kingdom, phylum, class, order, family, genus, species
How were all classification systems made?
manmade (artificial)
Who is Linnaeus?
he is the father of modern taxonomy. he started using binomial nomenclature
What does recombination do?
It increases the frequency of mutant genes in a population
What are most mutant genes?
recessive and sometimes it takes many generations for them to be expressed
What does isolation do?
causes variations to be produced through new gene combinations
What helps to drive the evolutionary process?
Environment, the number of offspring produced, and natural selection
What is the only thing that can lead to an evolution of a species?
a germ mutation
What does the environment determine?
the success of failure of a variation
What would happed if all the types of organisms that ever lived were still living?
you would have trouble in some cases of finding evidence of gradual transition from common ancestors to all existing forms of life