Read the following scenarios and pick the best answer.
10. The Utah Division of Wildlife Resources is attempting to restore Bonneville cutthroat trout, Utah’s state fish, to Mill Creek Canyon in Salt Lake City. This fish species was thought to be extinct until small populations were discovered. Attempts to save the Bonneville cutthroat trout fish species involves removing non-native fish from Mill Creek, taking out fish barriers that prevent the fish from freely swimming up and down the river, and then restocking the native Bonneville cutthroat trout to the creek. Which of the following will show that restoration (fixing) attempts have resulted in a stable Bonneville cutthroat trout population in Mill Creek Canyon? *
1 point
Counts made by river fishermen show an increase in the number of non-native fish in Mill Creek.
The speed of the river is measured to be faster after fish barriers are removed.
Hundreds of cutthroat trout are restocked to the river in April. In May, fishermen count an increased number of cutthroat trout in the river.
11. The graph shows changes in the stability of an ecosystem over a period of time. Which statement best describes the change in ecosystem stability shown in the graph? *
1 point
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A stable ecosystem can be altered then it can recover to a point of stability
An ecosystem remains unchanged as it stability decreases
The stability of an ecosystem remain unchanged but its diversity decreases
A stable ecosystem cannot recover after it is altered.
12. Use the graph to answer the question. If the environment were to change dramatically or a new plant disease were to break out, which plant type would most likely survive? (HINT: Think about biodiversity) *
1 point
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Wild wheat
Domestic wheat
Wild corn
Domestic corn