What is one drawback of using evidence found in rock layers to determine a relative history of the earth? 1. not all organisms leave fossils

2. not all layers contain salt deposits

3. all areas of earth have distinct rock layers

4. rock layers are never disturbed

Which of the following are evidenced-based behavioral interventions for decreasing behavior? fct differential reinforcement pvt time delay a and b

Depending on the organism the number of in a cell may change

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