Model Food Breakdown Practice Test

A teacher shows two models of the same food entering an organism.

Model A: Food enters → food breaks into smaller molecules → smaller molecules rearranged into new molecules that become part of the organism.

Model B: Food enters → food is shown as the same molecule the whole time → the model labels the end result as “energy only.”

Which statement about food breakdown is supported by the evidence in Model A compared with Model B?

Reminder: digestion breaks down and rearranges food molecules.

A class is comparing four simplified models of food entering an organism and changing inside it. In all four, the food starts as one large molecule outside the organism.

Which model shows the best evidence that digestion breaks food molecules into smaller molecules and then rearranges them (instead of destroying them), based on a clear before-and-after comparison?

Reminder: digestion breaks down and rearranges food molecules.