Multiple choice Which of the following bacteria is used as biological pesticide? Thiobacillus ferrooxidans Xanthomonas campestris Lactobacillus delbrueckii Acetrobacter aceti Bacillus thuringiensis Reveal answer Fill a bubble to check yourself E Correct answer Explanation This option is correct because Bacillus thuringiensis (or Bt) is a gram-positive, soil-dwelling bacterium, commonly used as a biological pesticide