For an experiment on the impacts of the pesticide carbaryl and the presence of a predator, the red-spotted, newt on tadpole survival the tadpoles were placed into four different groups of tubs: water only and no predator water only with a predator visible pesticide dosed water with no predator pesticide dosed water with a predator visible it was observed that tadpoles in the water only tubs had a 90+% survival rate regardless of the presence of a predator. the tadpoles in the pesticide dosed water however were strongly divided with 90+% of tadpoles surviving when there was no predator present and less than 20% surviving in the presence of a predator. does this experiment demonstrate interaction between the two treatments?