Answer:
D. Alveoli
Explanation:
Functionally, the respiratory system is separated into a conducting zone and respiratory zone:
Conducting zone consists of the nose, pharynx, larynx, trachea, bronchi, and bronchioles. These structures form a continuous passageway for air to move in and out of the lungs.
Respiratory zone is found deep inside the lungs and is made up of the respiratory bronchioles, alveolar ducts, and alveoli. These thin-walled structures allow inhaled oxygen (O2) to diffuse into the lung capillaries in exchange for carbon dioxide (CO2).
The respiratory zone begins where the terminal bronchioles join a respiratory bronchiole, the smallest type of bronchiole, which then leads to an alveolar duct, opening into a cluster of alveoli.
<span>1) Malthus</span> Hutton influenced darwins idea
4) <span>4. Darwin concluded that if humans could influence an offspring's traits, so could nature.</span>
C. Combine with hemoglobin to form oxyhemoglobin
Haploid means half, and diploid means double of the half, and so its diploid number will be 20⋅2=40 if its haploid number is 20 .
