How can we possibly define life? Or, how can we tell when something is alive? Are there certain characteristics which make us say that an animal (a cat or a dog) is alive as opposed to a chunk of rock? As a response to this Topic, describe at least one characteristic that you think is shared by all things that are alive and explain why you think it's important. Feel free to be as creative as you like!! Also feel free to dispute the characteristics described in the text or those suggested by your fellow classmates. Make sure to use a scientific source and include a citation! Minimum of 3 paragraphs.