The bacterium Bacillus thuringiensis is widely used in contemporary biology as

Options

A. Indicator of water pollution
B. Insecticide
C. Agent for production of dairy products
D. Source of industrial enzyme

Answer

B

Explanation

Some strains of Bacillus thuringiensis produce protein that kills certain insects such as lepidopterans coleopteran and dipterans. It forms protein crystals during a particular phase of their growth that when ingested become active toxin in gut of insects.