Local farmers think that a commonly used pesticide is responsible for the increase in appearance of frogs with an additional app
endage. To test this hypothesis, frogs are injected with a small amount of pesticide mixed in ethanol. The frogs are allowed to produce offspring to test the effect of the pesticide. Which of the following would be the best controlled experiment? A. One group is injected with ethanol, and one group is injected with pesticide. B. One group is injected with pesticide. C. One group is injected with pesticide, and one group is not injected with anything. D. One group is injected with ethanol, one group is injected with pesticide, and one group is not injected with anything.
A control group is needed to carry out the experiment, that control group is the one that is not injected with anything. Ethanol and pesticide need to be injected into separated groups to document whether it is one or the other that is harmful
The organism which is least similar to the other animals is the blue whale. This is because it belongs to the order cetacea while the other animals belong to the order carnivora. This means that the other animals are carnivorous in their mode of feeding but blue whale is not.
