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Biology Evolution Terms Mrs. jewett
Terms in this set (35)
This is a feature, characteristic, or trait that an organism has that allows it to be more suited or more adequate in a certain environment.
This is any change in an organism's genes, such as point level mutation like missence mutations which will usually have a positive benefit for the organism.
Note: one mutation can cause a large effect, but it is usually a lot working together.
This is the production of a zygote when a sperm and egg combine together or fuse.
This is the selection of the fittest organism based on how adequate they are to their environment and this will be chosen by natural factors.
This is the selection and breeding of organisms based on the traits that are admired by the humans and what we are looking for.
This is the differences between individuals in a population or species and shows how each organism is different in some way.
All the genes that are present in a population.
This is a group of interbreeding organisms that do not ordinarily breed with members of another species.
This is the change in gene sequence for a trait in a population that is caused some sort of biological processes.
Decent with Modification
This means as generations passed the population's descents or future generations are not exactly the same, they have modifications or differencing and new traits.
This is a phylogenetic tree based on a cladistic analysis.
This is when a small population is produced from a larger population and the ones that are part of the new population are selected by chance, not by being the most fit.
Note: there are two type, bottleneck and flounder effect
This is the selection of the fitness organism based on certain traits that increase mating success.
Note: there are two types
This is the isolation or splitting of species due to a geographical features preventing them and this leads to each population evolving and attaining different traits.
This is the measurement of how adequate an organism or species is to a certain environment.
This is the usage of developmental stages during an embryo to help determine relatedness.
These are parts of of an organism's body that are similar to another species' body parts.
Note: this points to a common ancient ancestor
These are structures of different species that have the same or similar function but they did not come from the same evolutionary origin.
These are structures in organisms that no longer serve a function but points out similarities between them and different species.
Two different organisms that have a mutualistic relationship evolve together.
The two ends are most fit. Middle falls out.
This is when one extreme phenotype is favored over the rest.
This is when the middle of graph has highest fitness.
Two organisms can't breed because they breed at different times.
Even if they come into contact and breed at the same time, they will not if they are not attracted to each other.
They can not mate if they are not physically compatible.
mating does not occur due to reproductive parts not fitting together.
New species appear suddenly, fossils show few in between forms, species show stability.
Species slowly develop over time, fossils show many in between forms.
This is when two unrelated organisms independently evolve because of similar environments.
Note: this produces analogous structures.
Adaptive Radiation (Divergent)
Single species evolved into several different species.
A change in the allele frequency of a population as a result of chance events rather than natural selection.
All the genes that are present in a population
A process typically caused by the genetic isolation from a main population resulting in a new genetically distinct species.
Determines Approximate age of a fossil with respect to another rock or fossil. Can tell is fossil is older or younger.
The actual age of a fossil.