Yes, short answer, I can not give you the specifics (consult your biology textbook)
The answer is ‘the only truly distinctive primate trait’. Prehensile hands are a distinctive trait of primates an opposable thumb (capable of grasping). The digits have nails instead of claws, and tactile pads enriched with sensory nerve fibers at the ends of digits to feel to manipulate objects.
A forester's main responsibilities are to develop plans for growth and sustainability, assess the viability of timber in an area, assess an area for possible issues, and monitor the health of timber in an area.
The people represented by the ends of the bell-curve are the most rare.
This could mean that if it's an iq curve the people at the ends have either a really high or really low iq etc.