Question

1. the flow of energy in a grassland ecosystem is shown. based on the diagram, which two populations best represent trophic levels that receive the least amount of the total energy provided to the ecosystem by the grass?

Explanation:

Step1: Recall energy - flow in ecosystem

Energy decreases as it moves up trophic levels. Producers (grass) have the most energy, and top - level consumers have the least.

Step2: Identify top - level consumers

Hognose snakes and owls are top - level consumers in this food web. They are at higher trophic levels compared to other organisms listed.

Answer:

Hognose snakes and owls