biodiversity and evolution Flashcards
Biological Evolution
The change in inherited traits over successive generations in population of organisms
Population
a group of individuals that are the same species
Small scale (micro-evolution)
going from one generation to the next and considering the changes in a population
Large Scale (evolution)
What you see when you look at the over-arching history of life, including divergence of populations and the creation of different species from a common ancestor over generations
Alfred Russel Wallace
also realized that populations of organisms change by adapting to change in the environment
Alfred Russel Wallace: also realized that populations of organisms change by adapting to change in the environment
Migration (gene flow)
founder effect
genetic drift
bottleneck
natural selection
Is the process whereby organisms that happen to be better adapted to their environment, tend to survive and produce more offspring; relies on genetic diversity
Mutation events
can happen during the cell division process that producers egg and sperm
Mutations:
permanent changes in genetic information that can be passed down from parent to offspring if they occur in the gametes; source of new traits in a population organism
components necessary for evolution
- variation or more than one version of a trait
- heritable trait/ a trait passed down from parent to offspring vie genetics
- differential reproduction/ An individual possessing the trait must have a reproductive advantage compared to individuals who don’t possess the trait; Those offspring must be viable and fertile
Theory of macroevolution is supported by..
- fossil record, genomic records, similarities in structure, embryo development