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Transcript
Contain DNA Grow and develop Respond to their environment (stimuli) Made of cells Evolve (as a group) Undergo metabolism Maintain homeostasis Reproduce DNA is a molecule used within cells of all living things o Stores information needed to live, grow and reproduce o DNA is a code for building proteins Growth includes getting larger in size or height, weight Development includes an organism’s life cycle A stimulus is a signal to which an organism responds A response is an organism’s reaction to a stimulus Cells are the basic units of structure and function All cells come from other cells specialization takes place in complex multicellular organisms Unicellular Multicellular Single cell Many cells Simple More complex Remain very small Make up larger organism Cellular Traits are passed from one generation to the next through DNA o Physical - external o Physiological – internal Random changes in the genetic material of a cell are called mutations Variations/changes in the genetic material of an organism that enhance (improve) an organisms ability to survive and reproduce are called adaptations Populations change over time due to natural selection or survival of the fittest Evolution = change over time Living things use chemical reactions to build up or break down materials called metabolism No metabolism = death! Have relatively constant internal physical and chemical conditions, called homeostasis Ensures that DNA is passed from parent(s) to offspring. Sexual Reproduction Asexual Reproduction 2 1 More variation No variation Humans & many other animals Bacteria & most single celled organisms