The correct answer among the choices provided is option A. Lung capillaries are responsible for exchanging carbon dioxide for oxygen from the air. Blood that comes from the heart gets oxygen from the alveoli. The carbon dioxide in the blood goes into the alveoli at the same time.
B <span>What is the effect of crop selection for pest resistance on the distribution of leaf size in a population of plants?
</span>
B. cellular respiration, Hope this helps!
