What is the primary role of the respiratory system in living organisms? a. to make carbon dioxide b. to obtain oxygen c. to use up nitrogen d. to find hydroge?

25. what does meiosis create? haploids or diploid? somatic cells or gametes?

What is the difference between the conducting zone and the respiratory zone of the respiratory system? the conducting zone is a series of cavities and tubes that move air to the respiratory zone where gases exchange with the bloodstream. the conducting zone exchanges gases between the lungs and the alveoli and the respiratory zone is a series of cavities and tubes that move air to the conducting zone. the conducting zone moves oxygen into the cells and the respiratory zone takes carbon dioxide away from the cells. the conducting zone moves oxygen into the bloodstream and the respiratory zone takes carbon dioxide away from the bloodstream.

Why should organisms reproduce more offspring than will survive? select all that apply.