Organisms alive today may resemble extinct organisms. The human body is composed of different systems, serving different purposes. Life Cycles Of Organisms Environmental changes such as the weather and seasons influence the life and death of animals and plants. Life has continued on earth for a very long time. Organisms And Their Environments Living things are part of a system and are interdependent with their living and non-living surroundings.
Food chains show one way living things depend on each other.
An organism's patterns of behavior are related to its environment. Natural resources are limited and must be used very carefully. Human influences have intitiated change in earth environments. These grade level performance standards are listed developmentally. However, each school is uniquely organized.