Bacillus thuringiensis (Bt) is a spore forming (flash animation) bacterium that produces crystals protein (cry proteins), which are toxic to many species of insects.t is largely used in agriculture, especially organic farming. Bt is also used in urban aerial spraying programs, and in transgenic crops. To learn more about each of these topics, click on the corresponding link on the left.
Advantages and Limitations of Ratio Analysis. Financial ratio analysis is a useful tool for users of financial statement. It has following advantages: 1  It simplifies the financial statements.  It helps in comparing companies of different size with each other.
DEFINITION of 'Concentration Ratio'. In economics, a ratio that indicates the relative size of firms in relation to their industry as a whole. Low concentration ratio in an industry would indicate greater competition among the firms in that industry than one with a ratio nearing 100%, which would be evident in an industry characterized by a true monopoly.