An energy transformation is
a. when energy is destroyed.
b. when energy changes from one form to another.
c. when energy is created.

before it leaves the nucleus of a eukaryotic cell, mrna is altered in the following ways: - a cap is added to the 5' end of the mrna molecule; - a poly a tail is added to the 3' end; - introns are removed and exons are spliced together.

it's not c. i took the quiz and got it wrong. so my best guess is b.

have a great day, and hope this .