A. Cottonwood tree -> Elk
B. Elk -> Cottonwood tree
C. Cottonwood tree <- Elk
D. Elk <- Cottonwood tree
Correct answer: A. Cottonwood tree -> Elk
Question 1
1. Elk enjoy eating the leaves of Cottonwood trees. Which of the following represents a food chain with proper arrows showing energy flow that is found in the ecosystem described above.(1 point)
5 answers
How did the reintroduction of the grey wolf, a carnivore predator, affect the population of the cottonwood trees, a type of producer?
(1 point)
Responses
The cottonwood tree population did not change.
The cottonwood tree population did not change.
The cottonwood tree population decreased and then stabilized.
The cottonwood tree population decreased and then stabilized.
The cottonwood tree population increased and then stabilized.
The cottonwood tree population increased and then stabilized.
The cottonwood tree population increased and then decreased back to zero.
(1 point)
Responses
The cottonwood tree population did not change.
The cottonwood tree population did not change.
The cottonwood tree population decreased and then stabilized.
The cottonwood tree population decreased and then stabilized.
The cottonwood tree population increased and then stabilized.
The cottonwood tree population increased and then stabilized.
The cottonwood tree population increased and then decreased back to zero.
The cottonwood tree population increased and then stabilized.
3. Use the drop down menus to complete the paragraph describing the events related to the reintroduction of the grey wolves into Yellowstone National Park.(6 points)
Before people understood their importance in the ecosystem, the
was hunted almost to extinction. Because of this, the
population grew much too large. They overgrazed and caused significant reduction in the population of
. When the grey wolf was reintroduced, they began to naturally
the population of elk. This allowed the cottonwood tree population to
. After several years of adjustment, all three populations
and showed healthy oscillation in the ecosystem.
Before people understood their importance in the ecosystem, the
was hunted almost to extinction. Because of this, the
population grew much too large. They overgrazed and caused significant reduction in the population of
. When the grey wolf was reintroduced, they began to naturally
the population of elk. This allowed the cottonwood tree population to
. After several years of adjustment, all three populations
and showed healthy oscillation in the ecosystem.
Before people understood their importance in the ecosystem, the grey wolf was hunted almost to extinction. Because of this, the elk population grew much too large. They overgrazed and caused significant reduction in the population of cottonwood trees. When the grey wolf was reintroduced, they began to naturally control the population of elk. This allowed the cottonwood tree population to increase. After several years of adjustment, all three populations stabilized and showed healthy oscillation in the ecosystem.
1 answer