Biology Marking Period 3 Practice Test

Energy moves through ecosystems in two related ways: a simple line or a complex network. A food chain shows a single path of energy transfer from a producer up to a top predator, illustrating one possible route. A food web, however, maps many interconnected feeding relationships, revealing how organisms can have multiple prey and multiple predators, creating a network of energy flow rather than a single track. So, the statement that best contrasts them is the one that says a food chain is a simple path from producer to top consumer, while a food web shows multiple interconnected pathways. The other options describe parts of the idea but don’t capture the clear contrast between the linear chain and the interconnected web as completely.