Which of the following statement is true? Animals cannot be changed into petrified fossil. The process of petrifaction is always completed. Replacing original materials by minerals creates petrified fossils. Petrified wood can only be found closer to the equator.

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

Stephen is a student who wants to test his knowledge of medical terminology. which option could he use?

What happens during the experiment stage of the scientific method