This document contains questions from a biology textbook chapter about the characteristics of living things. It asks students to define what an organism is, name six characteristics shared by all living things, explain the differences between multicellular and unicellular organisms and between stimuli and responses. It also asks students to explain the historical ideas of spontaneous generation from 400 years ago, describe experiments by Francesco Redi and Louis Pasteur related to spontaneous generation, and explain why food, water, living space, and stable internal conditions are essential needs for living things.