The structure that is directly involved in gas exchange during respiration would be the alveoli. These are tiny sacs located in the lungs that enable oxygen and CO2 to move through the lungs and the bloodstream. Its main function is for gas exchange. It allows oxygen to diffuse into the blood for transport to tissues and remove carbon dioxide from it as well.
It would slow down in the stage of growing or
<span>Bt is biodegradable and known to have (a) short persistence time(s).</span>
It would be, B. Asteroid belt.
Answer:
C. Artificial selection
Explanation:
This is artifical selection because it is "the identification by humans of desirable traits in plants and animals, and the steps taken to enhance and perpetuate those traits in future generations". Humans are unnaturally choosing which humans can survive! Hope this helps :D
