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A duopoly (from Greek δύο, duo ' two '; and πωλεῖν, polein ' to sell ') is a type of oligopoly where two firms have dominant or exclusive control over a market, and most (if not all) of the competition within that market occurs directly between them. Duopoly is the most commonly studied form of oligopoly due to its simplicity.
Lists of extinct animals by country (2 P) A. Lists of animals of Australia (7 C, 31 P) N. Lists of animals of New Zealand (1 C) Lists of animals of Nigeria (1 C) U.
This is a list of countries that have officially designated one or more animals as their national animals. Most species in the list are officially designated. Some species hold only an "unofficial" status. Additionally, the list includes animals that were once official but are no longer, as well as animals recognized as national symbols or for ...
Animal breeds by country of origin (130 C, 1 P) Animal husbandry by country (14 C, 3 P) Animal welfare and rights by country (78 C, 4 P) Endemic fauna by country (194 C)
Pages in category "Wildlife by country" The following 127 pages are in this category, out of 127 total. This list may not reflect recent changes. A.
Over 1.5 million living animal species have been described—of which around 1 million are insects—but it has been estimated there are over 7 million in total. Animals range in size from 8.5 millionths of a metre to 33.6 metres (110 ft) long and have complex interactions with each other and their environments, forming intricate food webs .
Duopoly: Oligopoly: Buyers: Monopsony: Duopsony: Oligopsony: In economics, a duopsony is a market structure in which only two buyers substantially control the ...
The following is a list of the classes in each phylum of the kingdom Animalia. There are 107 classes of animals in 33 phyla in this list. However, different sources give different numbers of classes and phyla. For example, Protura, Diplura, and Collembola are often considered to be the three orders in the class Entognatha. This list should by ...