Evolution #1
When two unrelated organisms evolve similar characteristics because they evolved in the same environment
Convergent evolution
If two or more organisms have similar amino acid or DNA sequences, it likely means...?
They are related/have a common ancestor
A group of organisms of the same species that live in the same area and reproduce with each other
Population
He proposed the theory of evolution by natural selection
Charles Darwin
Formation of new species
Speciation
Change in a species over time
What is evolution
A part of natural selection that specifically relates to competing for and choosing mates
Sexual selection
Preserved remains of ancient organisms
Fossils
Features of different species that are similar in function but not in structure
Analogous structures
Genetic drift has the greatest impact on populations when they are: (large or small)
Small
Structures that have no current function
Vestigial structures
Structures that are similar in anatomy but not in function
Homologous structures
A characteristic that helps an organism survive
Adaption
This evidence for evolution shows how different organism develop before birth
Comparative embryology
A type of genetic drift that occurs after the settling of a new population
Founder effect
When a catastrophic event wipes out part of the population and drastically reduces variation
Bottleneck effect
Process by which evolution occurs
What is natural selection
When new organisms enter or leave a population; increases genetic variation
Gene flow
The process in which humans breed organisms for certain traits
Artificial selection
The differences in the physical traits of organisms
What is variation
Those that are the most well adapted survive and reproduce
Natural selection
Diagram showing the evolutionary relationships between organisms.
Cladogram
When individuals in one species acquire enough variations in their traits that it leads to two distinct new species
Divergent evolution
The ultimate source of genetic variation
Mutations
Identify two ways genetic variation can be increased in a population
Gene flow, mutations, genetic recombination