DDIE Describe how it is possible for a signaling molecule like adrenaline to be
released into the bloodstream to all the cells in the body and have 3 totally
different effects in different locations. In some cells it triggers an increase
in glycolysis. In others it triggers a decrease in glycolysis. Finally, there are
some cells in which the adrenaline causes no response at all. Explain how
this might be possible in terms of cellular communication and signal

Ineed to know why d is the correct answer asap

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

Ascientist is designing an investigation to study the impact of invasive bird populations on local, native bird populations at backyard bird feeders. what population is most likely to be a control group for the investigation? amount of food number of bird feeders invasive bird populations local backyard birdfeeders without food