Often only small amounts of dna are found at a crime scene. which technique uses an enzyme to replicate dna regions from a small sample of dna for use in dna fingerprinting? a. vntrs (variable tandem repeats)/b. pcr (polymerase chain reaction)/c. analysis strs (short tandem repeats) / 4. mtdna (mitochondrial dna) analysis

The theories on the expansion of galaxies maybe re-examined to strengthen science should not be tested to strengthen science will weaken scientific knowledge if they change will become laws if they don't change

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?

Aresearcher designed an investigation to test what effect eating different types of food would have on blood insulin levels. she selected 10 male subjects who were all 25 years of age and in good health. the experiment took place over 3 days. at 8: 00 a.m. on each day, the subjects ate a meal consisting of only 1 type of food. they had their blood insulin levels measured after consuming the meal. on day 1 they ate a high fat diet, on day 2 they ate a high protein diet, and on day 3 they ate a high sugar diel what is the independent variable in this experiment? a the age of the subjects b the blood insulin level c the type of food consumed d the time of day the meal was consumed