A tiny drop of blood can provide DNA for DNA fingerprinting, although the analysis requires much more material than the blood sample provides. How does the analyst obtain enough DNA for the test?

Almost every cell? in our body contains our DNA?.

On average, about 99.9 per cent of the DNA between two humans is the same.

The remaining percentage is what makes us unique (unless you are an identical twin!).

Although this might sound like a small amount, it means that there are around three million base pairs? that are different between two people. These differences can be compared and used to help distinguish you from someone else.  

Minisatellites are short sequences (10-60 base pairs long) of repetitive DNA that show greater variation? from one person to the next than other parts of the genome?. This variation is exhibited in the number of repeated units or ‘stutters’ in the minisatellite sequence.

Explanation:

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.