| Aa riobambae | |
|---|---|
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Monocots |
| Order: | Asparagales |
| Family: | Orchidaceae |
| Subfamily: | Orchidoideae |
| Tribe: | Cranichideae |
| Genus: | Aa |
| Species: | A. riobambae |
| Binomial name | |
| Aa riobambae Schltr., 1921 | |
Aa riobambae is a species of orchid in the genus Aa .
It is native to Ecuador, where it grows at altitudes of 3,300 to 3,800 meters. [1]
Alcoholics Anonymous (AA) is an international fellowship of alcoholics dedicated to sobriety and recovery through its spiritually inclined Twelve Steps program. Membership and participation are free, though all expenses of the fellowship are covered by member donations. Structurally guided by its Twelve Traditions, AA is set up as non-professional, non-denominational, as well as self-supporting and apolitical, with an avowed desire to stop drinking being its sole requirement for membership. AA has not endorsed the disease model of alcoholism, to which its program is nonetheless sympathetic, but its wider acceptance is partly due to many members independently promulgating it. As of 2020, having spread to diverse cultures, including geopolitical areas normally resistant to grassroots movements, AA has had an estimated worldwide membership of over two million with 75% of those in the U.S. and Canada. AA results in higher abstinence rates and lower medical costs compared to either no treatment or treatments led by medical professionals.
American Airlines, Inc. is a major American airline headquartered in Fort Worth, Texas, within the Dallas–Fort Worth metroplex. It is the world's largest airline when measured by fleet size, scheduled passengers carried, and revenue passenger mile. American, together with its regional partners and affiliates, operates an extensive international and domestic network with almost 6,800 flights per day to nearly 350 destinations in more than 50 countries. American Airlines is a founding member of the Oneworld alliance, the third-largest airline alliance in the world. Regional service is operated by independent and subsidiary carriers under the brand name American Eagle.
In genetics, dominance is the phenomenon of one variant (allele) of a gene on a chromosome masking or overriding the effect of a different variant of the same gene on the other copy of the chromosome. The first variant is termed dominant and the second recessive. This state of having two different variants of the same gene on each chromosome is originally caused by a mutation in one of the genes, either new or inherited. The terms autosomal dominant or autosomal recessive are used to describe gene variants on non-sex chromosomes (autosomes) and their associated traits, while those on sex chromosomes (allosomes) are termed X-linked dominant, X-linked recessive or Y-linked; these have an inheritance and presentation pattern that depends on the sex of both the parent and the child. Since there is only one copy of the Y chromosome, Y-linked traits cannot be dominant nor recessive. Additionally, there are other forms of dominance such as incomplete dominance, in which a gene variant has a partial effect compared to when it is present on both chromosomes, and co-dominance, in which different variants on each chromosome both show their associated traits.
Anti-aircraft warfare or counter-air defence is the battlespace response to aerial warfare, defined by NATO as "all measures designed to nullify or reduce the effectiveness of hostile air action". It includes surface based, subsurface, and air-based weapon systems, associated sensor systems, command and control arrangements, and passive measures. It may be used to protect naval, ground, and air forces in any location. However, for most countries the main effort has tended to be homeland defence. NATO refers to airborne air defence counter-air and naval air defence as anti-aircraft warfare. Missile defence is an extension of air defence, as are initiatives to adapt air defence to the task of intercepting any projectile in flight.
In population genetics, the Hardy–Weinberg principle, also known as the Hardy–Weinberg equilibrium, model, theorem, or law, states that allele and genotype frequencies in a population will remain constant from generation to generation in the absence of other evolutionary influences. These influences include genetic drift, mate choice, assortative mating, natural selection, sexual selection, mutation, gene flow, meiotic drive, genetic hitchhiking, population bottleneck, founder effect and inbreeding.
AA Limited, trading as The AA, is a British motoring association founded in 1905, which currently provides vehicle insurance, driving lessons, breakdown cover, loans, motoring advice, road maps and other services. The association demutualised in 1999, to become a private limited company, and from 2014 a public limited company (plc). In 2021, a consortium led by Tower Brook capital partners and Warburg Pincus completed the acquisition of AA Limited. In 2002 the AA Motoring Trust was created to continue its public interest and road safety activities.
Aa is a genus of plants of the family Orchidaceae.
The American Association (AA) was a professional baseball league that existed for 10 seasons from 1882 to 1891. Together with the National League (NL), founded in 1876, the AA participated in an early version of the World Series seven times versus the champion of the NL in an interleague championship playoff tournament. At the end of its run, several AA franchises joined the NL. After 1891, the NL existed alone, with each season's champions being awarded the Temple Cup (1894–1897).
ATC code N06Psychoanaleptics is a therapeutic subgroup of the Anatomical Therapeutic Chemical Classification System, a system of alphanumeric codes developed by the World Health Organization (WHO) for the classification of drugs and other medical products. Subgroup N06 is part of the anatomical group N Nervous system.
The Architectural Association School of Architecture in London, commonly referred to as the AA, is the oldest independent school of architecture in the UK and one of the most prestigious and competitive in the world. Its wide-ranging programme of exhibitions, lectures, symposia and publications have given it a central position in global discussions and developments within contemporary architectural culture.
The AA battery is a standard size single cell cylindrical dry battery. The IEC 60086 system calls the size R6, and ANSI C18 calls it 15. It is named UM-3 by JIS of Japan. Historically, it is known as D14 or HP7 in official documentation in the United Kingdom, or a pen cell.
Eugenia María del Pino Veintimilla is a developmental biologist at the Pontificia Universidad Catolica del Ecuador in Quito. She was the first Ecuadorian citizen to be elected to the United States National Academy of Sciences (2006). She was awarded the 2019 Prize of the Latin American Society for Developmental Biology for her strong contributions to research in Ecuador, and in general to promoting Developmental Biology in Latin America.
The Andean marsupial tree frog, also known as the Riobamba marsupial frog or Riobamba pouched frog, is a species of frog in the family Hemiphractidae. It is endemic to Ecuador. The species is confined to the Andes and the inter-Andean valleys, from Imbabura south to Chimborazo. They live in an altitude of 2,200-3,500 meters above sea-level. The Andean marsupial tree frog's habitat varies from the montane forests to the dry rocky hillsides, and from the agave plants to the corn fields. Once a common species, it is threatened by severe habitat loss.
AaB, internationally referred to as Aalborg BK is a professional football team located in Aalborg. The club is represented in the Danish Superliga and has won four Danish football Championships and three Danish Cup trophies. Most recently the team won the double in 2014.
Anadolu Agency is a state-run news agency headquartered in Ankara, Turkey.
The 3rd Anti-Aircraft Division was an air defence formation of the Territorial Army, part of the British Army, created in the period of tension before the outbreak of the Second World War. It defended Scotland and Northern Ireland during the early part of the war.
The 2003 NCAA Division I-AA football rankings are from the Sports Network poll of Division I-AA head coaches, athletic directors, sports information directors and media members. This is for the 2003 season.
12th Anti-Aircraft Division was an air defence formation of the British Army during the early years of the Second World War. It defended Western Scotland and Northern Ireland, including the period of the Clydebank Blitz and Belfast Blitz, but only had a short career.
Emmanuel Gazmey Santiago, known professionally as Anuel AA, is a Puerto Rican rapper. His music often contains samples and interpolations of songs that were popular during his youth. He is seen as a controversial figure in the Latin music scene for his legal troubles and feuds with fellow Puerto Rican rappers Cosculluela and Ivy Queen and with American rapper 6ix9ine.
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