Today we talked about some aspects of extraterrestrial life. First, we need to determine what is necessary for life to exist. Life as we know it is based on carbon .
Life also requires water.
Maintenance our bodies are able to use energy and maintain our structure, even though all of the atoms in our bodies are replaced every seven years. Growth living things grow. Response to stimuli 5. Variation mutations change the nature of living organisms 7. Adaptation living things adapt to their environment.