To most untrained observers, the planets look a lot like stars. How did the ancients realize that there was something different about these planets, before the invention of the telescope? a
They had nearby moons that could be observed orbiting them
b
They move around or “wander” compared to the background stars over time
c
They were substantially brighter than any star
d
They were unique colors compared to the stars

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