Bacteria are single-celled living organisms. They are considered to be among the earliest forms of life and have been on Earth for about 4 billion years. The word "bacterium" is derived from the Greek wording meaning "ca... More » Science Biology

Living and nonliving things bear commonalities in that they are both comprised of matter, obey physical laws and tend toward states of minimum energy. Living things are different in that they can repair damage, grow and ... More » Science Biology

Living and nonliving things interact with each other by forming an ecosystem, where living things can obtain nutrients and energy from nonliving things through chemical processes. The nonliving things in an environment a... More » Science Environmental Science
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An organism that eats other organisms, living or dead, is called a consumer. Consumers are known by other names, depending on the type of food consumed. Categories of consumers include the omnivores, the meat-eating carn... More » Science Biology

During their life span, most viruses are both living and non-living organisms. Whether they are living or non-living depends on if they have found a host. More » Science Biology

Humans, dogs, lions, fish and any other living being are all examples of organisms. By definition, an organism is any contiguous living system or being. Even plants are examples of organisms. More » Science Biology

Photosynthesis is completed by many different organisms, ranging from plants to bacteria. Organisms that carry out photosynthesis are called photosynthetic. More » Science Biology