Ahot-air ballon is rising above the top of a hill.

which term describes the top of the hill?

-delta point
-distance system
-coordinate system
-reference point

Pretty sure its reference point because it is talking about the height compared to a hill

this is true, assuming that the allele is completely recessive and incomplete dominance is not a factor.

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: