in the course of measuring this data many thousands of lab mice and rats have been killed do you consider this to be ethical research why is data collected on lab mice instead of humans would it be more ethical to use a species that is more closely related to us like chimpanzees explain your answer

oxygen = 21% of the atmosphere

nitrogen = 78%

carbon dioxide = 0.1%

argon =0.934%

fumikage isn't really a bird, and tsuyu does have teeth. tsuyu has a transformation quirk which still allows her to be partially human. otherwise we'd have a large frog running around. fumikage has teeth because again, he isn't a bird. his head was a quirk mixture if i'm correct.