7.11 Origins of Life on Earth
in AP Biology
Two major hypothesis for life on Earth. Panspermia: Life from extraterrestrial life. Abiogenesis: Life from non-life. Requires 4 major milestones to occur.
7.10 Variation in Populations
in AP Biology
Variants that are well adapted to one environment may not be well adapted to another environment.
7.9 Extinction
in AP Biology
Extinction is the loss of a group of organisms, such as a species. Levels of biodiversity are determined by rates of speciation and rates of extinction.
7.8 Speciation
in AP Biology
Speciation, the origin of new species, is at the focal point of Darwin’s evolutionary theory. Evolutionary theory must explain how new species originate and how populations evolve.
7.7 Phylogeny
in AP Biology
Phylogeny is the evolutionary history of a species or group of related species. The discipline of systematics classifies organisms and determines their evolutionary relationships.
7.6 Continuing Evolution
in AP Biology
Evolution has led to new, rapidly spreading diseases, called emerging diseases.
7.5 Evidence of Common Ancestry and Evolution
in AP Biology
Biogeography provides information about the evolutionary history of organisms, specifically where they originated and how they were able to disperse.
7.4 Hardy-Weinberg Equilibrium
in AP Biology
When certain conditions are met, allele and genotype frequencies do not change, a state called the Hardy-Weinberg equilibrium. “Hardy-Weinberg equilibrium”: Refers to an idealized, non-evolving population.
7.3 Population Genetics
in AP Biology
Natural selection acts on individuals, but only populations evolve. Genetic variations in populations contribute to evolution.
7.2 Natural and Artificial Selection
in AP Biology
Natural selection is the differential reproductive success of genetic variants and was independently conceived by Charles Darwin and Alfred Russel Wallace.