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.
The limitations of the study are those characteristics of design or methodology that impacted or influenced the interpretation of the findings from your research.escriptions of limitations should be stated in the past tense because they were discovered after you completed your research. Possible Methodological Limitations. 1  Sample size -- the number of the units of analysis you use in your study is dictated by the type of research problem you are investigating.