1. What is one characteristic that all living things and only living things have in common? 2.How did both the Redi and Pasteur experiments prove there was no such thing as a spontaneous generation? 3.Why do living things need water, food, and space to live? 4.The paws of the arctic fox are covered in thick fur. How does this help the fox maintain homeostasis?

If all prokaryotes on earth suddenly vanished, which of the following would be the mostlikely and most direct result? a) the number of organisms on earth would decrease by 10—20%.b) human populations would thrive in the absence of disease.c) bacteriophage numbers would dramatically increase.d) the recycling of nutrients would be greatly reduced, at least initially.e) there would be no more pathogens on earth.