Which of the following statements is NOT true about the Grand Canyon? The Grand Canyon is older than the rocks in its walls.
O
The oldest rocks in the canyon are found near the bottom.
The rock layers on both sides are in the same order.
The canyon is about five to six million years old.

Most animal cells membranes have proteins that pump ions out of the cell and potassium ions into the cell

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

Tom wants to conduct a scientific study but he needs to finish by the end of the school year. what practical way could tom work around this limitation and be successful in his study?