The answer is The Nervous System.
It interacts with all the other systems, it tells them what to do.
Hope it helps!
Y=-(x^2-20x+64)
----find two numbers that multiply to 64 and add to -20. They are -16 and -4--
y=-(x-16)(x-4)
ROOTS : 16, 4
The reptile is evolving over millions of years.
