A biological process such as photosynthesis. 13. Billions of years ago, Earth's atmosphere<span> was composed </span>primarily<span> of carbon dioxide</span>
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<span>Ask a Question.Do Background Research.Construct a Hypothesis.Test Your Hypothesis by Doing an Experiment.Analyze Your Data and Draw a Conclusion.<span>Communicate Your Results.</span></span>
Answer:
Living things respond to the environment.
Explanation:
John's body is responding the the cold environment by shivering.
Explanation:
ln order for photosynthesis to happen, you need six carbon dioxide (co2) molecules, six water molecules (H02), and light energy. photosynthesis one molecule of sugar (c6H1202).