What is currently happening for the first time in human history in relation to obesity?   A. In most countries in the world, cancer kills more people than obesity.   B. In most countries in the world, hunger kills more people than obesity.   C. In most countries in the world, infectious disease kills more people than obesity.   D. In most countries in the world, obesity kills more people than hunger.

What contributes to obesity among humans today?     a. eating more calorie dense foods     b. sedentarism     c. epigenetic factors     d. all of the above

People with bulimia have elevated ghrelin levels. Is this abnormality a likely cause of bulimia? And what is the evidence? a. No. It is probably not a cause. The abnormality is common in the ethnic groups who are most likely to develop bulimia. b. No. It is probably not a cause. As people recover from bulimia, their ghrelin level returns toward normal. c. Yes. It is probably a cause. People who show high ghrelin early in life are likely to develop bulimia later. d. Yes. It is probably a cause. Inducing high ghrelin in rats causes the rats to develop bulimia.

Which of the following statements is a hypothesis?   Select one: A.  I will feed my cat more food. B.  Increasing my cat’s food consumption will result in a 25% increase in her weight. C.  My cat has gained weight; therefore, she is eating more food. D.  Will increasing my cat’s food increase her weight?