Gas exchange in humans is the delivery of oxygen lungs to the bloodstream, and the elimination of carbon dioxide from the bloodstream to the lungs.
The correct answer is D. The theory of natural selection provided a better explanation of the processes that were being observed by the scientists.They observed that the related species birds found on one island were slightly different from that of the other, and certain portions earth, have the species, which were not found anywhere else.
Answer
c
Explanation:
because mechanical energy has approximately 2.65% chemical energy causing it to be able to constantly change.
The most dangerous use of pesticides for humans is that spreading pesticides with <span>airplanes. I cannot be a help if we use airplanes to spread the pesticides because it will not come to the land who need it rather or maybe it will come to the village where people lives.</span>
