What is Life?
Life is the characteristic that distinguishes living things from non-living things. It includes the ability to grow, reproduce, respond to stimuli, and adapt to the environment. Living organisms are made up of cells, the basic unit of life.
Characteristics of Life
- Cellular Organization: All living things are composed of cells, which are the basic structural and functional units of life.
- Reproduction: Living organisms can produce offspring either sexually or asexually.
- Growth and Development: Living things grow and undergo changes in form and function over the course of their lives.
- Response to Stimuli: Living organisms can respond to internal and external stimuli in their environment.
- Homeostasis: Living organisms maintain a stable internal environment despite external changes.
- Adaptation: Living things can adapt to their environment through evolutionary changes over time.
- Metabolism: Living organisms utilize energy and chemical processes to sustain life.
Study Guide
- What are the basic units of life?
- How do living organisms reproduce?
- Explain the concept of homeostasis in living organisms.
- What are some examples of stimuli to which living organisms can respond?
- Describe the process of growth and development in living things.
- How do living organisms adapt to their environment?
- What is metabolism and why is it important for life?
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Worksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyThe resources above cover the following skills:
LIFE SCIENCE
Unity and Diversity
Construct an argument from evidence to explain the likelihood of an organism’s ability to survive when compared to the resources in a certain habitat (e.g., freshwater organisms survive well, less well, or not at all in saltwater; desert organisms survive well, less well, or not at all in woodlands).
Create models that illustrate how organisms and their habitats make up a system in which the parts depend on each other.