Terms in this set (57)
end of an evolutionary line or the end of a species, family, or larger group of organisms
physical evidence of an organism that lived long ago
collection of fossils that represents the preserved history of living things on earth
transitions that occur between one "type" of organism and another
body parts of different organisms that are different in detail, but similar in general structure and relation to each other
a type of homologous structure that is no longer used as it is in most other organisms that have it
a group of organisms that can breed with one another and produce fertile offspring in a natural enviornment
the process by which new species evolve from old one
a separation of populations so that they do not interbreed, allowing natural selection to work differently on each group
change in populations of living organisms on planet earth through time
descent with modification
darwin's idea that species of organisms originate as modified descendants of other species
the explanation for evolutionary change proposed by darwin and wallace
a technique utilizing the known rates of decay of radioactive elements to pinpoint the age of a rock or fossil
method of determining the sequential order of fossils and sediment
the time needed for one and half of a radioactive substance to decay
selection driven by the competition for mates, considered adjunct to natural selection
an inherited characteristic that increases an organisms chance of survival
all the alleles of all the genes present in a given population
the introduction of new alleles (or new allele frequencies) from one population to another due to migration
changes in allele frequencies of a gene pool due to chance
change in a gene pool due to large-scale disaster/death in a population
change in a gene pool due to immigration of part of a population to a new area
selection that shifts the norm of a population in one direction
selection that increases the extremes in a population
selection that increases the norm in a population
fossils that illustrate a series of evolutionary changes between two different kinds of organisms
an impression left in surrounding rock by a buried organism
natural filling of a mold left behind after a fossil has been removed from the rock
process by which shell or skeletal material is infiltrated by minerals making it dense and heavy
parts of different organisms that have similar function, but not the same origin
a representation of the evolutionary history of a group of organisms
the number of times that allele appears in a gene pool, compared to the number of times other alleles for the same gene occur
the practice of naming and classifying organisms
a community of individuals of the same species
natural selection acts directly on...
The age of the earth is measured in ________ of years.
Alteration of allele frequencies by chance events is defined as
A species is a group of organisms which...
can mate and produce offspring which can also reproduce.
Selection of a mate based solely on a physical attribute of the other is an example of:
If average individuals of a population are selected for it is which type of selection?
A group of individuals of the same species that interbreed make up a...
Fins of a dolphin and a shark have similar function & different evolutionary origins. This is:
Which is NOT evidence of the theory of evolution?
What may occur in a population as a result of an earthquake that killed 80% of individuals?
when a physical barrier causes a species to not be able to interbreed over time it is called
True or False: The more similar DNA sequences are in organisms the closer they are related.
fossils can be found in
Evolution is the change in ________________ over a period of time.
frequency of alleles in a population
All the alleles of a population is defined as:
Charles Darwin noticed a variety of adaptations to which body part of the Finch?
What would cause the LEAST changes in a population?
large population, few mutations
Speciation occurs when:
Members can no longer interbreed & produce viable offspring
True or false: Soft bodies become fossilized better than hard bodies.
gene flow is...
Movement of individuals in and out of a population
True or false: Genetic equilibrium is caused by mutations in the gene pool.
theory based on idea that organic molecules came from extraterrestrial sources
theory based on idea of conposition of the early oceans and atmosphere
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