Being able to roll the tongue is dominant over not being able to roll the tongue.
r r
r rr rr
r rr rr
what is the probability that the offspring will be unable to roll the tongue?
0
2
3
4

answer:

convection currents in the magma drive plate tectonics. heat generated from the radioactive decay of elements deep in the interior of the earth creates magma (molten rock) in the aesthenosphere. the aesthenosphere (70 ~ 250 km) is part of the mantle, the middle sphere of the earth that extends to 2900 km.

a=c and then d= c because of the band so you get ac/dc and you add them together you get sound waves