Aupmanyav
Be your own guru
I am not surprised. With that kind of teacher what could you have learnt!You brought back memories of a Biology/ Science teacher that I had and he was laughing at the time because scientists were removing wings off of fruit flies to see if successive generations would be born without wings.
The reason he laughed was because Jewish circumcision was practiced for thousands of years and that practice caused No change, so it is No surprise that generation after generation after generation of fruit flies were still born with wings.
However, there are wingless insects also. Wingless insect - Wikipedia
"Some do not grow wings at all, having "lost" the possibility in the remote past. Some have reduced wings that are not useful for flying. Some develop wings but shed them after they are no longer useful."