Glossary of Terms Regarding Evolution

Glossary of Terms Regarding Evolution Following are definitions of common terms referring to the Theory of Evolution that everyone should know and understand, though this is by no means a comprehensive list. Many of the terms are often misunderstood, which can lead to an inaccurate understanding of evolution. The links lead to more information on the topic: Adaptation: Changing to fit a niche or survive in an environment Anatomy: Study of the structures of organisms Artificial Selection: Characteristics selected by humans Biogeography: Study of how species are distributed across the Earth Biological Species: Individuals that can interbreed and produce viable offspring Catastrophism: Changes in species that happen because of quick and often violent natural phenomena Cladistics: Method of classifying species in groups based on ancestral relationships Cladogram: Diagram of how species are related Coevolution: One species changing in response to changes in another species that it interacts with, particularly predator/prey relationships Creationism: Belief that a higher power created all life Darwinism: Term commonly used as a synonym for evolution Descent With Modification: Passing down traits that might change over time Directional Selection: Type of natural selection in which an extreme characteristic is favored Disruptive Selection: Type of natural selection that favors both extremes and selects against the average characteristics Embryology: Study of the earliest stages of development of an organism Endosymbiotic Theory: Currently accepted theory as to how cells evolved Eukaryote: Organism made of cells that have membrane-bound organelles Evolution: Change in populations over time Fossil Record: All known traces of past life ever found Fundamental Niche: All available roles an individual can play in an ecosystem Genetics: Study of traits and how they are passed down from generation to generation Gradualism: Changes in species that happen over long periods of time Habitat: Area in which an organism lives Homologous Structures: Body parts on different species that are similar and most likely evolved from a common ancestor Hydrothermal Vents: Very hot areas in the ocean where primitive life might have begun Intelligent Design: Belief that a higher power created life and its changes Macroevolution: Changes in populations at the species level, including ancestral relationships Mass Extinction: Event in which large numbers of species died out completely Microevolution: Changes in species at a molecular or gene level Natural Selection: Characteristics that are favorable in an environment and are passed down while undesirable characteristics are bred out of the gene pool Niche: ​Role an individual plays in an ecosystem Organelle:Â  Subunit within a cell that has a specific function Panspermia Theory: Early theory proposing that life came to Earth on meteors from outer space Phylogeny: Study of relative connections between species Prokaryote: Organism made up of the simplest type of cell; has no membrane-bound organelles Primordial Soup: Nickname given to the theory that life started in the oceans from the synthesis of organic molecules Punctuated Equilibrium: Long periods of consistency of a species interrupted by changes that happen in quick bursts Realized Niche: Actual role an individual plays in an ecosystem Speciation: The creation of a new species, often from evolution of another species Stabilizing Selection: Type of natural selection that favors the average of the characteristics Taxonomy: ​Science of classifying and naming organisms Theory of Evolution: Scientific theory about the origins of life on Earth and how it has changed over time Vestigial Structures: Body parts that seem to no longer have a purpose in an organism

How To Write Dates in Spanish

How To Write Dates in Spanish There is  a variety of subtle differences between writing common things in English and in Spanish. Such is the case with writing dates in the two languages: Where in English one might say February 5, 2019, a Spanish writer would express the date as 5 de febrero de 2019. Key Takeaways: Writing Dates in Spanish The most common way of writing dates in Spanish follows the form number de month de year.Names of the months are not capitalized in Spanish.With the exception of primero for first, the ordinal numbers are not used in dates in Spanish. Note that in Spanish the name of the month isnt capitalized. You can also spell out the number - as in cinco de enero de 2012 - but this is less common than using a numeral in the example above. However, in parts of Latin America, especially in areas with U.S. influence, you may also see the form abril 15 de 2018 in occasional use, and rarely you may see a period used in the year such as 2.006. Another important distinction is that in Spanish you should not imitate English by using ordinal forms such as tercero de marzo as a direct translation of third of March. The one exception is that you may say primero for first, so January 1st can be said as primero de enero. In numeral form, thats 1o, or a 1 followed by superscripted o, not a degree sign. Less commonly, the form 1ero is used. As in the examples below, dates are typically preceded by the definite article el in sentences. Sample Sentences Showing Use of Dates in Spanish El 16 de septiembre de 1810 era  el dà ­a de independencia de Mà ©xico. (Sept. 16, 1810, was Mexicos independence day.) La Epifanà ­a se celebras el 6 de enero de cada aà ±o en los paà ­ses hispanohablantes. (Epiphany is celebrated in Jan. 6 of each year in Spanish-speaking countries.) El 1 de enero es el primer dà ­a del aà ±o en el calendario gregoriano. (Jan. 1 is the first month of the year of the Gregorian calendar.) El proceso de recuento parcial comenzà ³ el 3 de mayo y todavà ­a continà ºa. (The partial recount process began on May 3 and still continues.) Desde el aà ±o de 1974, el primero de julio celebramos el Dà ­a del Ingeniero en Mà ©xico. (Since the year 1974, we celebrate the Day of the Engineer on July 1st.) Use of Roman Numerals and Abbreviated Forms In abbreviated form, Spanish typically follows a day-month-year pattern using a capitalized Roman numeral for the month. The units may be separated by spaces, slashes, or hyphens. Thus the abbreviated form of July 4, 1776, can be written in these ways: 4 VII 1776, 4/VII/1776, and 4-VII-1776. Theyre the equivalent of 7/4/1776 in American English or 4/7/1776 in British English. Common forms used for B.C. are aC and a. de C. -   for antes de Cristo  or before Christ - with variations in punctuation and sometimes the use of J.C. (Jesucristo) instead of merely using the letter  C. In scholarly writing, you may use AEC  as the equivalent of the English BCE, which means antes de la Era Comà ºn  or Before the Common Era. The equivalent of A.D. is despuà ©s de Cristo  or after Christ and can be abbreviated d. de C.  or dC  with the same variations as noted above. You also may use EC  (Era Comà ºn) for CE (Common Era). The abbreviations AEC  and EC  are even less commonly used in Spanish than their English equivalents are in English, mainly because they arent universally understood. They normally shouldnt be used unless demanded by the context, such as if writing for publication in an academic journal. Pronouncing the Years The years in Spanish are pronounced the same as other cardinal numbers are. Thus, for example, the year 2040 would be pronounced as dos mil cuarenta. The English custom of pronouncing the centuries separately - in English we typically say twenty-forty instead of two thousand forty - is not followed. Saying veinte cuarenta instead of dos mil cuarenta would strike native Spanish speakers as the mark of an English speaker. Using Prepositions With Dates Spanish does not use a preposition as the equivalent of on when indicating that something happens on a particular date. The date itself functions as an adverbial phrase, as it does in English when on is omitted. Such examples include la masacre ocurrià ³ el 14 de marzo wherein the phrase means The massacre occurred on March 14, with the Spanish word for on (en) not used. Similarly in English, one could correctly say The massacre occurred March 14.   During or throughout, on the other hand, can be added into the phrase by including the Spanish word for this, durante.  Such is the case in the Spanish version of the sentence Space exploration began during the 20th Century, which can be written as Durante el siglo XX dio comenzà ³ la exploracià ³n espacial.