For example, humans have distinct body structures for walking, holding, seeing, and talking. Life cycles of organisms Plants and animals have life cycles that include being born, developing into adults, reproducing, and eventually dying. The details of this life cycle are different for different organisms. Animals closely resemble their parents. All animals depend on plants.
Some animals eat plants for food.
Other animals eat animals that eat the plants. An organism's patterns of behavior are related to the nature of that organism's environment, including the kinds and number of other organism present, the availability of food and resources, and the physical characteristics of the environment. All organisms cause changes in the environment where they live. Some of these changes are detrimental to the organism or the organisms, whereas others are beneficial. Humans depend on their natural or constructed environments.