Life is a characteristic that distinguishes physical entities that have biological processes, such as growth, reproduction, and response to stimuli, from those that do not, either because such functions have ceased (death), or because they never had such functions and are classified as inanimate. The study of life is known as biology, and it encompasses a wide range of topics, including the structure, function, growth, origin, evolution, and distribution of living organisms.
Characteristics of Life
Cellular Organization: All living things are composed of one or more cells, which are the basic units of structure and function in an organism.
History and Nature of Science: A student should understand the history and nature of science. A student who meets the content standard should:
Develop an understanding that historical perspectives of scientific explanations demonstrate that scientific knowledge changes over time, building on prior knowledge.
Develop an understanding that scientific knowledge is ongoing and subject to change as new evidence becomes available through experimental and/or observational confirmation(s).