A chain reaction, or nuclear reaction, after shooting a single neutron bullet at a piece of uranium 235, a chain reaction for energy starts.
Something that isn't a major concern could be the wether because the whether usually does not effect his experimental concept. In this case his concept is testing the effects of peanut butter on short term memory
An entomologist is a zoolist interested in insects. The are interested in finding and studying the classification of the life cycle, insects environments, how they relate to humans and their organisims
The lists of the correct order of evolutionary history is Jellyfish, Reptiles, Mammals. This three are classified as vertebrates and all I know that almost all the animals we know are vertebrates. Jellyfish is a fish that do not have a backbones, example of reptiles is garter snake, there are so many mammals in the forest such as bat, rodent, bear and much more.