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- https://bio.libretexts.org/Courses/Gettysburg_College/02%3A_Principles_of_Ecology_-_Gettysburg_College_ES_211/06%3A_Population_Ecology/6.02%3A_Life_Histories_and_Natural_SelectionA species’ life history describes the series of events over its lifetime, such as how resources are allocated for growth, maintenance, and reproduction. Life history traits affect the life table of an...A species’ life history describes the series of events over its lifetime, such as how resources are allocated for growth, maintenance, and reproduction. Life history traits affect the life table of an organism. A species’ life history is genetically determined and shaped by the environment and natural selection.
- https://bio.libretexts.org/Workbench/General_Ecology_Ecology/Chapter_8%3A_Life_Histories/2%3A_Life_History_EvolutionThe content for this subtopic is found in an external page. Please click the link below to access this information. Life History Evolution Fabian, D. & Flatt, T. (2012) Life History Evolution. Nature ...The content for this subtopic is found in an external page. Please click the link below to access this information. Life History Evolution Fabian, D. & Flatt, T. (2012) Life History Evolution. Nature Education Knowledge 3(10):24
- https://bio.libretexts.org/Workbench/General_Ecology_Ecology/Chapter_8%3A_Life_Histories/3%3A_The_Evolution_of_Aging2015, Rando & Chang 2012), use of factors from young blood that restore the age-related loss of function of stem cells or synapses between nerve cells in the brain (Rando & Chang 2012, Mair & Dillin 2...2015, Rando & Chang 2012), use of factors from young blood that restore the age-related loss of function of stem cells or synapses between nerve cells in the brain (Rando & Chang 2012, Mair & Dillin 2008), and alteration of the composition of the microorganisms in the gut to a younger profile (Clark & Walker 2018, Kundu et al.
- https://bio.libretexts.org/Courses/Gettysburg_College/01%3A_Ecology_for_All/08%3A_Life_Histories/8.02%3A_Semelparity_versus_IteroparityOne class of models that tries to explain the differential evolution of semelparity and iteroparity examines the shape of the trade-off between offspring produced and offspring forgone (offspring that...One class of models that tries to explain the differential evolution of semelparity and iteroparity examines the shape of the trade-off between offspring produced and offspring forgone (offspring that will not be produced). In the first graph, the marginal cost of offspring produced is decreasing (each additional offspring is less "expensive" than the average of all previous offspring) and the marginal cost of offspring forgone is increasing.
- https://bio.libretexts.org/Courses/Gettysburg_College/01%3A_Ecology_for_All/06%3A_The_Evolution_of_Populations_and_Species/6.03%3A_The_Hardy-Weinberg_EquilibriumThe Hardy-Weinberg law argues that the gene frequencies and genotype ratios in a randomly-breeding population remain constant from generation to generation. Evolution involves changes in the gene poo...The Hardy-Weinberg law argues that the gene frequencies and genotype ratios in a randomly-breeding population remain constant from generation to generation. Evolution involves changes in the gene pool, while a population in Hardy-Weinberg equilibrium shows no change. Hence, populations are able to maintain a reservoir of variability so that if future conditions require it, the gene pool can change.
- https://bio.libretexts.org/Courses/Gettysburg_College/01%3A_Ecology_for_All/03%3A_Introduction_to_Evolution/3.05%3A_Adaptive_EvolutionFitness is often quantifiable and is measured by scientists in the field. However, it is not the absolute fitness of an individual that counts, but rather how it compares to the other organisms in the...Fitness is often quantifiable and is measured by scientists in the field. However, it is not the absolute fitness of an individual that counts, but rather how it compares to the other organisms in the population. This concept, called relative fitness, allows researchers to determine which individuals are contributing additional offspring to the next generation, and thus, how the population might evolve.
- https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Biology_(Kimball)/19%3A_The_Diversity_of_Life/19.01%3A_Eukaryotic_Life/19.1.11%3A_Drosophila_MelanogasterThis page outlines the advantages of using Drosophila (fruit flies) in genetic studies, highlighting their small size, rapid life cycle, and high reproduction rates which support statistically signifi...This page outlines the advantages of using Drosophila (fruit flies) in genetic studies, highlighting their small size, rapid life cycle, and high reproduction rates which support statistically significant results. It mentions the presence of giant polytene chromosomes in larvae for structural analysis, the external development of embryos for easy observation, and the small genome that allows for targeted mutations, all contributing to their effectiveness in research.
- https://bio.libretexts.org/Workbench/BIOL-11B_Clovis_Community_College/19%3A_Population_and_Community_Ecology/19.02%3A_Life_Histories_and_Natural_SelectionScientists have posited alternate explanations for the evolutionary advantage of the Chinook’s post-reproduction death: a programmed suicide caused by a massive release of corticosteroid hormones, pre...Scientists have posited alternate explanations for the evolutionary advantage of the Chinook’s post-reproduction death: a programmed suicide caused by a massive release of corticosteroid hormones, presumably so the parents can become food for the offspring, or simple exhaustion caused by the energy demands of reproduction; these are still being debated.
- https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/General_Biology_1e_(OpenStax)/8%3A_Ecology/45%3A_Population_and_Community_Ecology/45.2%3A_Life_Histories_and_Natural_SelectionA species’ life history describes the series of events over its lifetime, such as how resources are allocated for growth, maintenance, and reproduction. Life history traits affect the life table of an...A species’ life history describes the series of events over its lifetime, such as how resources are allocated for growth, maintenance, and reproduction. Life history traits affect the life table of an organism. A species’ life history is genetically determined and shaped by the environment and natural selection.
- https://bio.libretexts.org/Courses/Thompson_Rivers_University/Principles_of_Biology_II_OL_ed/04%3A_Ecology/4.02%3A_Population_Ecology/4.2.03%3A_Life_Histories_and_Natural_SelectionA species’ life history describes the series of events over its lifetime, such as how resources are allocated for growth, maintenance, and reproduction. Life history traits affect the life table of an...A species’ life history describes the series of events over its lifetime, such as how resources are allocated for growth, maintenance, and reproduction. Life history traits affect the life table of an organism. A species’ life history is genetically determined and shaped by the environment and natural selection.
- https://bio.libretexts.org/Courses/Norco_College/Principles_of_Ecology/04%3A_Population_Ecology/4.03%3A_Life_Histories_and_Natural_SelectionA species’ life history describes the series of events over its lifetime, such as how resources are allocated for growth, maintenance, and reproduction. Life history traits affect the life table of an...A species’ life history describes the series of events over its lifetime, such as how resources are allocated for growth, maintenance, and reproduction. Life history traits affect the life table of an organism. A species’ life history is genetically determined and shaped by the environment and natural selection.
