Ok. Thanks. Re:
“the professor notes there are no examples in scientific literature showing that “mutations that affect early development and the body plan as a whole and are not fatal.””
Therefore there are examples of mutations that affect early development and the body plan as a whole that are not fatal.
What are they?
(I hope you don’t say “all of them”)
If you take the ‘no’ out you also have to take the ‘not’ out.
So it would read: Therefore there are examples of mutations that affect early development and the body plan as a whole that ARE fatal.