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In population biology and demography, generation time is the average time between two consecutive generations in the lineages of a population.In human populations, generation time typically has ranged from 20 to 30 years, with wide variation based on gender and society.
Non-overlapping generations are found in species in which the adult generation dies after one breeding season. If a species for instance can only survive winter in the juvenile state the species will automatically consist of non-overlapping generations. The bee Amegilla dawsoni, an example of a species with non-overlapping generations
Voltinism is a term used in biology to indicate the number of broods or generations of an organism in a year. The term is most often applied to insects, and is particularly in use in sericulture, where silkworm varieties vary in their voltinism. Univoltine (monovoltine) – (adjective) referring to organisms having one brood or generation per year
Generation is also a synonym for birth/age cohort in demographics, marketing, and social science, where it means "people within a delineated population who experience the same significant events within a given period of time." [3] The term generation in this sense, also known as social generations, is widely used in popular culture and is a ...
In biology, evolution is any change across successive generations in the heritable characteristics of biological populations. Evolutionary processes give rise to diversity at every level of biological organization , from kingdoms to species , and individual organisms and molecules , such as DNA and proteins .
The doubling time is the time it takes for a population to double in size/value. It is applied to population growth , inflation , resource extraction , consumption of goods, compound interest , the volume of malignant tumours , and many other things that tend to grow over time.
Generation time is often implicated as one of the major factors contributing to this disparity, with perennials having longer generation times and likewise an overall slower mutation and adaptation rate. [33] This may result in higher genetic diversity in annual lineages. [37] Plant taxon groups that have evolved both annual and perennial life ...
Coalescent theory is a model of how alleles sampled from a population may have originated from a common ancestor.In the simplest case, coalescent theory assumes no recombination, no natural selection, and no gene flow or population structure, meaning that each variant is equally likely to have been passed from one generation to the next.