What is one source for the variation that drives natural selection?
a.
mutation
c.
over production
b.
cloning
d.
population shifts

select the best answer from the choices provided

a
b
c
d

What energy conversion occurs when a sling shot is used to shoot a rock across the room? (2 points) question 2 options: 1) stored mechanical energy is converted to mechanical energy. 2) stored mechanical energy is converted to radiant energy. 3) gravitational energy is converted to radiant energy. 4) gravitational energy is converted to mechanical energy.