Common descent is a concept in evolutionary biology applicable when one species is the ancestor of two or more species later in time. All living beings are in fact descendants of a unique ancestor commonly referred to as the last universal common ancestor (LUCA) of all life on Earth, according to modern evolutionary biology.. Common descent is an effect of speciation, in …

Evidence of common descent of living organisms has been discovered by scientists researching in a variety of disciplines over many decades, demonstrating that all life on Earth comes from a single ancestor.This forms an important part of the evidence on which evolutionary theory rests, demonstrates that evolution does occur, and illustrates the processes that created Earth's …

The common swift (Apus apus) is a medium-sized bird, superficially similar to the barn swallow or house martin but somewhat larger, though not stemming from those passerine species, being in the order Apodiformes.The resemblances between the groups are due to convergent evolution, reflecting similar contextual development.The swifts' nearest relatives are the New World …

The last universal common ancestor or last universal cellular ancestor (LUCA), also called the last universal ancestor (LUA), is the most recent population of organisms from which all organisms now living on Earth share common descent—the most recent common ancestor of all current life on Earth. A related concept is that of progenote. The LUCA is not thought to be …

The common starling or European starling (Sturnus vulgaris), also known simply as the starling in Great Britain and Ireland, is a medium-sized passerine bird in the starling family, Sturnidae. ... mainly including the clogging of engines that concurrently shutdown the plane into descent. From the years 1990–2001, 852 incidents of aircraft hazard due to starlings and blackbirds were …

In biology and genetic genealogy, the most recent common ancestor (MRCA), also known as the last common ancestor (LCA) or concestor, of a set of organisms is the most recent individual from which all the organisms of the set are descended.The term is also used in reference to the ancestry of groups of genes rather than organisms.. The MRCA of a set of individuals can …

Common-law marriage, also known as non-ceremonial marriage, sui iuris marriage, informal marriage, or marriage by habit and repute, is a legal framework where a couple may be considered married without having formally registered their relation as a civil or religious marriage.. The original concept of a "common-law marriage" is one considered valid by both …

Two languages have a genetic relationship, and belong to the same language family, if both are descended from a common ancestor, or one is descended from the other. The term and the process of language evolution are independent of, and not reliant on, the terminology, understanding, and theories related to genetics in the biological sense, so, to avoid confusion, …

The Common Travel Area (CTA; Irish: Comhlimistéar Taistil, Welsh: Ardal Deithio Gyffredin) is an open borders area comprising the United Kingdom, Ireland, Isle of Man, and the Channel Islands.The British Overseas Territories are not included. Based on agreements that are not legally binding, the internal borders of the CTA are subject to minimal controls and can …

The expression military–industrial complex (MIC) describes the relationship between a country's military and the defense industry that supplies it, seen together as a vested interest which influences public policy. A driving factor behind the relationship between the military and the defense-minded corporations is that both sides benefit—one side from obtaining war …