History of life: evolution
by: Lauren Caldwell
This project was based on Evolution & Classification.
We have learned about the evidence of evolution, mechanisms of evolution, patterns of evolution, and classification. These are summarizations on what our group has learned this unit. What is evolution?Evolution is the process in which modern organisms have descended from ancient organisms.
Evidence of evolution
-Paleontology
-Geography -Anatomy -Embryology -Biochemistry Paleontology This is the study of the comparison of ancient species and current species. Geography Shows that similar environments have similar types of organisms. Anatomy Studies and compares homologues structures and body parts Homologues structures- Structures that have different mature forms in different forms in different organisms, but develop from the same embryonic tissue. Embryology Studies similarities of development and evolution of common ancestry. Biochemistry Studies DNA and molecules, then draws conclusions of close relations |
Mechanisms of evolutionThere are five mechanisms that influence population: Gene flow, Genetic Drift, Natural Selection, Sexual Selection, and Mutation.
Gene Flow Is the transfer of genes from one population to another. Genetic Drift Is the change of frequency of an allele due to random sampling. Natural Selection Is the gradual process in which heritable traits become either more or less common in a population Sexual Selection Is the process in which some organisms reproduce more than others in a species because they are better at obtaining mates. Mutation Is when there is a completely now gene in a population. Patterns of evolutionGroups of species go through different types of natural selections and overtime may engage in different patterns of evolution: convergent evolution, divergent evolution, parallel evolution, and coevolution.
Classification
Classification or taxonomy is the process of identifying, naming, and categorizing organisms based on their physical and biological traits.
Scientist use the " Tree of Life" to help classify organisms: Domain Kingdom Phylum Class Order Family Genus Species All of these help categorize one living organisms and helps determine your relations to other species. |
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