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Quizlet's primary products include digital flash cards, matching games, practice electronic assessments, and live quizzes. In 2017, 1 in 2 high school students used Quizlet. [ 4 ] As of December 2021, Quizlet has over 500 million user-generated flashcard sets and more than 60 million active users.
Each team's score is determined by the number of questions answered correctly minus the number answered incorrectly. The team(s) with the highest score(s) win(s) the tiebreak. If two teams are still tied, the two teams compete head-to-head, receiving five toss-up questions at 4 points for each correct answer (no bonus questions are used).
Two decades since the first eukaryotes were sequenced, the "biological role" of around 20% of proteins are still unknown. [10] Many of these proteins are conserved across most eukaryotic species and some are conserved in bacteria, indicating a role fundamental for life.
Edward Hitchcock's fold-out paleontological chart in his 1840 Elementary Geology. Although tree-like diagrams have long been used to organise knowledge, and although branching diagrams known as claves ("keys") were omnipresent in eighteenth-century natural history, it appears that the earliest tree diagram of natural order was the 1801 "Arbre botanique" (Botanical Tree) of the French ...
Also acid ionization constant or acidity constant. A quantitative measure of the strength of an acid in solution expressed as an equilibrium constant for a chemical dissociation reaction in the context of acid-base reactions. It is often given as its base-10 cologarithm, p K a. acid–base extraction A chemical reaction in which chemical species are separated from other acids and bases. acid ...
Cheating on a test is the process of using unauthorized means or methods to obtain a desired test score or grade. This may range from bringing and using notes during a closed book examination, to copying another test taker's answer or choice of answers during an individual test, to sending a paid proxy to take the test. [66]