During an evening hike, you see a shooting star just like the one pictured here. In which layer of the atmosphere does this shooting star occur? troposphere stratosphere mesosphere thermosphere
The answer is mesosphere

Some people call them shooting stars. Those meteors are burning up in the mesosphere. The meteors make it through the exosphere and thermosphere without much trouble because those layers don't have much air. But when they hit the mesosphere, there are enough gases to cause friction and create heat.

sex cells are usually half's then they find another half and make a fertilize egg

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.