To provide energy to build new cells and tissue
Alveoli is the answer.
<span>In humans, once carbon dioxide reaches the capillaries in the lungs, it is diffused into the Alveoli.
Hope this helps! :) </span>
The cattle and the microorganisms are <span>mutualistic symbionts. The correct option among all the options that are given in the question is the second option or option "B".
</span>In general, more complex animals are <span>more likely to have a digestion tract than to have a gastrovascular cavity. he correct option among all the options given is option "D". </span>
D. is your correct answer
