It would be B. i hope i helped you out, have a nice day
The oxygen molecules moves through the nostrils, pharynx, trachea, bronchus, smaller and smaller branches of the bronchial tree, and then into the alveolus.
Answer:
The scientific method
Explanation:
1. Observation
2. Ask a question
3. Form hypothesis
4. Make a prediction of hypothesis
5. Test Prediction
6. Iterate: make new hypothesis or problems with found results.
Nucleic acids also typically contain phosphorous, and nitrogen plays an important structural role in nucleic and proteins. The proteins, being made up a diverse set of amino acids, have, in addition to carbon, hydrogen, oxygen, and nitrogen, the elements sulfur and selenium.
Structure and function-there are only TWO types of cells-prokaryotic and eukaryotic
