Adaptation - The biological mechanism by which organisms adjust to new environments or to changes in their current environment., Scientific Theory - An explanation for observations of the natural world that has been constructed using the scientific method, and which brings together many facts and hypotheses.Mar, Mechanism - The causal explanation of a particular phenomenon., Competition - The interaction of organisms that leads to a change in fitness when the organisms share the same resource, so in limited supply, individuals fight for a common resource., Gene Expression - The process by which the instructions in our DNA are converted into a functional product, such as a protein., Fitness - An organism's ability to pass its genetic material to its offspring. Species with this ability can pass on their genes and ensure their survival. , Gene Flow - The gene transfer from one population to another., Genetic Drift - The change in frequency of an existing gene variant in the population due to random chance, resulting in reduced genetic variation., Sexual_Selection - An example of a mechanism for evolution., Fossil_Record - Helps paleontologists, archaeologists, and geologists place important events and species in the appropriate geologic era., Embryo - An unborn or unhatched offspring in the process of development., Homologous Structures - Similar physical features in organisms that share a common ancestor, but the features serve completely different functions, such as: limbs of humans or cats., Gene Transfer - The introduction of new DNA into an existing organism's cell., Endosymbioses - A symbiotic relationship where one organism lives inside the other. , Natural_Selection - The process through which populations of living organisms adapt and change., Fossil Record - This is based on the Law of Superposition which states that in undisturbed rock sequences the bottom layers are older than the top layers.,

Biological Evolution Vocabulary 2

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