Standard Science Primary 6 Interactions

Study the food web below. If all the snakes were killed by hunters, what would happen to the population of frogs and grass?

A Frogs decrease; Grass decreases
B Frogs increase; Grass increases
C Frogs decrease; Grass increases
D Frogs increase; Grass decreases
Show Worked Solution

Worked Solution

Step 1: Snakes are predators of frogs. Fewer snakes → more frogs survive. Step [2-9]: More frogs will eat more grasshoppers. Step [2-9]: If grasshoppers decrease, less grass is eaten, BUT frogs also eat other insects. In a standard chain Grass → Grasshopper → Frog → Snake, more frogs eat more grasshoppers, which might help grass, but more frogs usually means higher overall predation on the primary consumers.

Correct answer: Frogs increase; Grass decreases

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