On the Origins
The essential elements for the development of organic life on Earth.
What are CHNOPS?
Selection in which extreme alleles are selected against evolving the population.
What is stabilizing selection?
A group of individuals capable of interbreeding and producing viable offspring.
What is a species?
Prezygotic isolating mechanism in which organisms do not encounter each other
What is habitat isolation?
Inherited characteristics of organisms that enhance their survival and reproduction in specific environments
What are adaptations?
The aspects of biology which suggest life formed in an aquatic environment.
What are hydrolysis and dehydration reactions?
Sexual selection which leads to sexual dimorphism.
What is male competition?
Evolutionary theory which suggests little change occurs in species followed by periods of adaptive radiation.
What is punctuated equilibrium?
Postzygotic isolating mechanism where offspring have reduced fertility.
What is hybrid breakdown?
Evolution when two non-related organisms begin to develop analogous traits.
What is convergent evolution?
The property of oxygen that may have prevented the formation of biomolecules early in Earth's formation.
What is high electronegativity?
A change in allele frequency due to changes in the environment.
What is natural selection?
General patterns of change in groups of related species that have occurred over broad periods of time leading to speciation.
What is macroevolution?
Two species perform mating rituals at different times throughout the year
What is an example of temporal isolation?
It has been suggested that the phenotype of tan skin appearing in people from Ireland comes from survivors of the Spanish Armada washing up in Ireland. This is an example of
What is an example of gene flow?
A trait in all living organisms in which membranes create differing internal and external environments.
What is selective permeability?
The exchange of DNA between non-sister chromatids during prophase I of meiosis creating variation in a population.
What is crossing over?
When a population contains variation in allele frequency which may lead to sympatric speciation in cases of non-random mating.
What is a balanced polymorphism?
A form of reproductive isolation in which gametes are unable to survive within the fertilizing environment.
What is gametic isolation?
The total number of alleles for a trait in a population.
What is a gene pool?
Organisms which form an endosymbiotic relationship in eukaryotic cells.
What are the chloroplast and mitochondria?
An increase in fitness due to an organism possessing a dominant and recessive allele
What is heterozygote advantage?
When an organism is isolated from the original population in a new environment and new behaviors form, this can lead to
What is speciation?
When a human male is found out to have purchased fake Hollister/Empire, no girl will date him. This is an example of which type of reproductive isolation
What is an example of behavioral isolation?
The result of different phenotypes appearing due to changes in nucleotide order.
What is variation?