I think you really need to read a Biology 101 text book.
Nah. All he has to do is really go outside & look carefully at some plants &
animals, rather than sitting in his little inner city apartment & letting his
imagination run wild.
My sister-in-law is a certified substitute science teacher in New Mexico. Yet
some years ago while she was visiting us, it turned out she didn't know that
dogs (and all other higher mammals) have belly buttons. She has owned dogs all
her life, but never really looked at them (besides sleeping in biology class).
People don't use their eyes.


Iris,
Central NY, Zone 5a, Sunset Zone 40
"The trouble with people is not that they don't know but that they know so much
that ain't so."
Josh Billings (Henry Wheeler Shaw), 1818-1885