The demand for which kind of lightbulb has stayed about the same during this time period? The graph shows the percentages of different types of lightbulbs shipped to consumers in North America over three years.
A. LED
B. CFL
C. Incandescent
D. Fluorescent

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

Genetic disorders can result when sister chromatids fail to seperate properly. during what phase is this problem most likely to occur?

Are the layers of rock above and below the coal older or younger?