1. After the number of wolves declined in Yellowstone National Park, ____.? a. ?
ID: 290468 • Letter: 1
Question
1. After the number of wolves declined in Yellowstone National Park, ____.?
a.
?the ecosystem recovered and became more stable
b.
?forest fires decreased in frequency because the larger mule deer population controlled undergrowth
c.
?herds of elk, moose, and mule deer devastated willow and aspen trees near streams and rivers
d.
?the elk population crashed
e.
?coyotes took over their role in the ecosystem, leading to few changes
Indicate whether the statement is true or false.
2. Desert ecosystems are fragile because they have slow plant growth, low species diversity, slow nutrient cycling, and very little water.?
a.
True
b.
False
3. ?When two species compete with one another for the same resource, their niches overlap.
a.
True
b.
False
4. Invasive species have no usefulness for humans.?
a.
True
b.
False
5. Both mature male lions and elephants bring in more money as ecotourism attractions than if they are poached for their hide and ivory.?
a.
True
b.
False
6. Tomorrow is forecast to be 10°F warmer than today. This is an example of climate.
a.
True
b.
False
7. ?The current rate of extinction is ____ compared to the rate that existed before humans arrived on the earth.
a.
?up to 1,000 times higher
b.
?about the same
c.
?almost 1,000 times lower
d.
?fluctuating wildly
e.
?slightly less
1. After the number of wolves declined in Yellowstone National Park, ____.?
a.
?the ecosystem recovered and became more stable
b.
?forest fires decreased in frequency because the larger mule deer population controlled undergrowth
c.
?herds of elk, moose, and mule deer devastated willow and aspen trees near streams and rivers
d.
?the elk population crashed
e.
?coyotes took over their role in the ecosystem, leading to few changes
Indicate whether the statement is true or false.
2. Desert ecosystems are fragile because they have slow plant growth, low species diversity, slow nutrient cycling, and very little water.?
a.
True
b.
False
3. ?When two species compete with one another for the same resource, their niches overlap.
a.
True
b.
False
4. Invasive species have no usefulness for humans.?
a.
True
b.
False
5. Both mature male lions and elephants bring in more money as ecotourism attractions than if they are poached for their hide and ivory.?
a.
True
b.
False
6. Tomorrow is forecast to be 10°F warmer than today. This is an example of climate.
a.
True
b.
False
7. ?The current rate of extinction is ____ compared to the rate that existed before humans arrived on the earth.
a.
?up to 1,000 times higher
b.
?about the same
c.
?almost 1,000 times lower
d.
?fluctuating wildly
e.
?slightly less
Explanation / Answer
1. e. Coyotes took over their role in ecosystem.
2. a. TRUE. All these conditions are true for desert ecosystems.
3. a. TRUE. Overlap of niches occur.
4. a. TRUE. Invasive Species spread harm to humans.
5. b. FALSE. Poaching brings in more money.
6. b. FALSE. This is an example of weather.
7. b. The current rate of extinction is a. upto 1000 times higher.
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