Checkpoint Science: Biology III: Ecosystems and Human Impact
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Free Checkpoint Science Q & A Practice
1 of 5 free Checkpoint-standard exercises in this section
The diagram shows a food web in a grassland. The arrows show the direction in which energy is transferred.
hawk
fox
snake
frog
mouse
rabbit
grasshopper
grass
A disease kills almost all of the grasshoppers. Which statement describes the most likely
immediate
effect on the food web?
Select one option.
A
The amount of grass decreases, because fewer grasshoppers are feeding on it.
B
The hawks die out, because grasshoppers are part of their food chain.
C
The number of frogs decreases, because grasshoppers are their only source of food.
D
The number of rabbits decreases, because rabbits feed on grasshoppers.
E
The number of snakes increases, because there are more frogs for them to eat.
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