Finish it of (Heart been broke so many times i don't know what to believe mama say its my fault it's my fault i wear my heart on my sleeve.

Think it's best I put my heart on ice, heart on ice ’cause I can't breathe

I'ma put my heart on ice, heart on ice, it's gettin' the best of me

Explanation:

no idea what song is it?

Explanation:

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).

the answer is z.

the human body has five levels of organization. level 1: cells. cells are the basic units of life and form the first level of organization. cells in the human body have specific functions. examples include nerve cells, blood cells, liver cells, and so on.