Hugo is testing the idea that moths are attracted to the heat of campfires. he watches a three-foot by three-foot area around an unlit camp fire for one hour and counts how many moths enter the area. he then lights the fire and counts how many moths enter the area for another hour. hugo finds that 5 moths entered the area before the fire was lit, but 26 moths entered it after it was lit. he concludes that moths are attracted to the heat of fires. which of these is an alternative explanation for hugo's results?

Which technically is nasa developing that will astronauts reach mars

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

What is the most abundant vertebrate on earth?