Question

10. The diagram below shows the feeding relationships between populations of organisms in an
area. The arrows point from the organism being eaten to the organisms eating them.
GRASS
GRASSHOPPERS
FROGS
Using only the relationships between the organisms shown in the diagram, if most of the
grasshoppers are killed, which of the following describes what will happen to the amount of
grass and the number of frogs?
a. The amount of grass will increase, and the number of frogs will decrease
b. The amount of grass will decrease, and the number of frogs will increase
C. The amount of grass will increase, and the number of frogs will stay the same
d. The amount of grass will stay the same, and the number of frogs will decrease

Answer 1

Answer:

The correct option is A)  The amount of grass will increase, and the number of frogs will decrease.

Explanation:

As from the above illustration, we can see that the grasshoppers feed on grass. The frogs feed on the grasshoppers.

If most of the grasshoppers are killed, then the grass will have fewer organisms to feed on it. As a result, the amount of grass will increase.

Reduction in the population of grasshoppers will mean that there is lesser food available for the frogs. As a result, the frogs will compete for food. Most will migrate, others might get killed due to lack of food. Hence, the population of frogs will reduce.