Evolution:LOHS
Terms
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- An observation that has been repeatly confirmed
- Fact
- A well researched explanation of some aspect of the natural world
- Theory
- A descriptive generalization about how some aspect of the natural world behaves under stated conditions.
- Law
-
When a species becomes better suited to the environment.
(Adapts) - Adaptation
- The process by which evolution occurs. The selection of organisms best suited to the environment
- Natural selection
- Structures of different species with similar functions but different origins.
- Analogous structures
- structures of different species with different functions but similar origins
- Homologous Structures
- structures that appear to have no current function
- Vestigial Structures
- The study of embryo development (before birth)
- embryology
- the intermediate (middle) species between 2 other species (missing link)
- transition species
- random changes in genetic characterstics.
- Mutation
- variety of genetic traits with in an interbreeding population
- genetic variation
- measure of radioactive isotopes to determine the age of a fossil or other organic item
- radiometric dating (carbon dating)
- the study of shape or form
- morphology
- evolution as a gradual change in a species over time
- gradualism
- evolution by long periods of no change followed by rapid change
- punctuated equilibrium
- remains or evidence of living things from long ago
- fossils
- species develop similiar characteristics due to similiar environment
- convergient evolution
-
2 populations of the same species due to isolation, become less like each other
Often leads to speciation - divergent evolution
- appearance of 1 or more new species
- speciation
- change among species such as extinction
- macroevolution
-
change that occure within a species over time
(beak change in birds-video) - microevolution
- the reproductive separation of populations either by physcial or behavior boundaries
- isolation
- the back and forth evolutionary adjustments between interacting species.
- coevolution
- struggle for limited resources (food, water, sunlight, mates, territory)
- competition