What is the best source of nuclear dna when working with hair samples

Imagine that a mouse has white fur because of a mutation in its dna. which of the following conclusions can be drawn

The energy required to vaporize a certain amount of a substance is greater than the amount of energy necessary to raise the temperature of the same amout of that substance by 1 degreee celcius

Math focus 4. calculate a map has index contours at 250 m, 500 m, and 750 m. what is the contour interval?