LichfieldLichfield (ˈlɪtʃfiːld) is a cathedral city and civil parish in Staffordshire, England. Lichfield is situated south-east of Stafford, north-east of Walsall, north-west of Tamworth and south-west of Burton Upon Trent. At the time of the 2021 Census, the population was 34,738 and the population of the wider Lichfield District was 106,400. Notable for its three-spired medieval cathedral, Lichfield was the birthplace of Samuel Johnson, the writer of the first authoritative Dictionary of the English Language.
Genetics and the Origin of SpeciesGenetics and the Origin of Species is a 1937 book by the Ukrainian-American evolutionary biologist Theodosius Dobzhansky. It is regarded as one of the most important works of modern synthesis and was one of the earliest. The book popularized the work of population genetics to other biologists and influenced their appreciation for the genetic basis of evolution. In his book, Dobzhansky applied the theoretical work of Sewall Wright (1889–1988) to the study of natural populations, allowing him to address evolutionary problems in a novel way during his time.
AnisogamyAnisogamy is a form of sexual reproduction that involves the union or fusion of two gametes that differ in size and/or form. The smaller gamete is male, a sperm cell, whereas the larger gamete is female, typically an egg cell. Anisogamy is predominant among multicellular organisms. In both plants and animals gamete size difference is the fundamental difference between females and males. Anisogamy most likely evolved from isogamy.
MicroevolutionMicroevolution is the change in allele frequencies that occurs over time within a population. This change is due to four different processes: mutation, selection (natural and artificial), gene flow and genetic drift. This change happens over a relatively short (in evolutionary terms) amount of time compared to the changes termed macroevolution. Population genetics is the branch of biology that provides the mathematical structure for the study of the process of microevolution.
GlyptodonAutomatic taxobox | fossil_range = Pliocene?-Pleistocene (Montehermosan?–Lujanian)~ | image = Glyptodon-1.jpg | image_caption = Skeleton of G. clavipes at the Naturhistorisches Museum, Vienna | taxon = Glyptodon | authority = Owen, 1839 | type_species = Glyptodon clavipes | type_species_authority = Owen, 1839 | subdivision_ranks = Other Species | subdivision = * G. elongatus? Burmeister, 1866 G. jatunkhirkhi Cuadrelli et al., 2020 G. munizi Ameghino, 1881 G. reticulatus Owen, 1845 | range_map = Glyptodon and Glyptotherium Distribution Map2.
GeneticistA geneticist is a biologist or physician who studies genetics, the science of genes, heredity, and variation of organisms. A geneticist can be employed as a scientist or a lecturer. Geneticists may perform general research on genetic processes or develop genetic technologies to aid in the pharmaceutical or and agriculture industries. Some geneticists perform experiments in model organisms such as Drosophila, C. elegans, zebrafish, rodents or humans and analyze data to interpret the inheritance of biological traits.
Parental investmentParental investment, in evolutionary biology and evolutionary psychology, is any parental expenditure (e.g. time, energy, resources) that benefits offspring. Parental investment may be performed by both males and females (biparental care), females alone (exclusive maternal care) or males alone (exclusive paternal care). Care can be provided at any stage of the offspring's life, from pre-natal (e.g. egg guarding and incubation in birds, and placental nourishment in mammals) to post-natal (e.g.
Ascension IslandAscension Island is an isolated volcanic island, 7°56′ south of the Equator in the South Atlantic Ocean. It is about from the coast of Africa and from the coast of South America. It is governed as part of the British Overseas Territory of Saint Helena, Ascension and Tristan da Cunha, of which the main island, Saint Helena, is around to the southeast. The territory also includes the sparsely populated Tristan da Cunha archipelago, to the south, about halfway to the Antarctic Circle.
MonoecyMonoecy (məˈniːsi; adj. monoecious məˈniːʃəs) is a sexual system in seed plants where separate male and female cones or flowers are present on the same plant. It is a monomorphic sexual system comparable with gynomonoecy, andromonoecy and trimonoecy, and contrasted with dioecy where individual plants produce cones or flowers of only one sex. Monoecy often co-occurs with anemophily. It can prevent self-pollination in an individual flower but cannot prevent self-pollination between male and female flowers on the same plant.
