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Review for Biodiversity and Communities Test
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by K. Petruzzi
| 20 Questions
1
1 pt
An organism that was over hunted because it could not fly and did not run away from humans
Emu
Penguin
Great Auk
Blue Footed Booby
2
1 pt
An organism whose populations are so low that they are in danger of becoming extinct
3
1 pt
An organism who is not necessarily abundant in a community but has a strong influence on maintaining the balance of the ecosystem.
ecosystem engineer
endemic species
indicator species
keystone species
4
1 pt
When an organism is no longer found in a localized region it is said to be
endangered
extant
extinct
extirpated
5
1 pt
Large islands close to the mainland have higher levels of _______________ compared to small islands far from the mainland
6
1 pt
A non-native species that causes economic or environmental harm
ecosystem engineer
endemic species
indicator species
invasive species
7
1 pt
An example would be if a road were built through a forest
habitat fragmentation
invasive species
climate change
pollution
8
1 pt
A community is dominated by two species that make up 76% of the individuals. This community would have low what?
9
1 pt
Illegal hunting of animals is also known as
10
1 pt
The two requirements for this thing is that it has a high diversity and that diversity must be threatened
11
1 pt
In a stream habitat, mayfly larvae only exist in clean, healthy streams. Mayflies would be classified as what type of organism?
ecosystem engineers
endemic species
indicator species
invasive species
12
1 pt
A company dumps 5 tons of arsenic into a local lake. This would be an example of what specific threat to species?
13
1 pt
The variety of traits within a population
14
1 pt
All living things existing in a given area
15
1 pt
Earthworms are known for burrowing in the sediment and mixing soil layers so that nutrients are distributed through. Without this process, vegetation would run out of nutrients at the surface and fail to grow. Earthworms would be classified as what type of organism?
ecosystem engineers
endemic species
indicator species
keystone species
16
1 pt
A community has a Shannon Diversity Index of 1.67 after 18 different species were found in that ecosystem. The ______________ of this community is equal to 18.
17
1 pt
In 1995, the bald eagle was upgraded from “endangered” but was still protected by the Endangered Species Act because it was classified as what type of species?
endemic
extirpated
invasive
threatened
18
1 pt
This organism was over hunted for their ivory tusks
19
3 pts
A bulldozer comes along, levels a forest and builds a parking lot over it. What type of threat to species would this be classified as?
20
1 pt
A species found in one location and one location only, such as Madagascar.
endemic
extirpated
indicator
invasive
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