Which arrow represents the change of state described above?
The diagram shows changes of state between solid,
liquid, and gas. The atoms of a substance lose energy
during a change of state. After the change, the atoms are
close together but are able to slide past one another.
gas
L
ON
O
ОР
M
z o
Р
solid
liquid
Q

the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation:

geologic time scale (for gradpoint) =)

1) a

2)c

3)a

4)c

5)b

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