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

Determine the  wavelength of light emitted when an electron  in an li2+ ion  makes a transition from an orbital with n  =  6 to an orbital with n  = 5.

They are like other investigations? say there was a murder u have to do blood test and finger prints which run through a lab. 

Okay well gravitational energy is matter forced by gravity making energy though the kinetic energy then the electric energy produces electricity from the kinetic energy and the kinetic energy gets its energy from the gravitational energy. was that the answer you wanted or something else?