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- 1. Multiple Choice
A drought has hit this grassland biome. How will this effect the rabbit population?The rabbits will increase in number.The rabbit population will stay the same.The rabbit population will decrease.The rabbit population will become extinct immediately. - 2. Multiple Choice
Which of the following most likely supports the most sustainable ecosystem?
The habitat with the greater number of green plants
The habitat with the greatest variety of living things
The habitat with the warmest average temperature
The habitat with the greatest number of consumers
- 3. Multiple Choice
Which of the following contributes most to promoting sustainability in an ecosystem?
Lack of decomposers
A balanced water table
Variety of organisms
A narrow temperature range
- 4. Multiple Choice
Which factor will negatively affect biodiversity?
All of the above
- 5. Multiple Choice
Which factor is least likely to determine the biodiversity of an area?
Amount of Wind
Average Temperature
Rainfall amount
Soil Type
- 6. Multiple ChoiceWhy is biodiversity important in fighting disease in food crops?It prevents one disease from wiping out an entire food crop.It prevents habitat loss of native species.It provides different foods for different populations.It prevents fungal disease from wiping out corn crops.
- 7. Multiple ChoiceWhy is biodiversity so important?Because all species depend on each other to survive, so if one becomes extinct another species that relies on it could go extinct as wellBecause it’s better to have only one variation of each species.Because it better to only have a few species on Earth.Honestly, I have no idea what biodiversity is!
- 8. Multiple Choice
Elephant are considered an important species in east Africa. During droughts, they dig deep holes in dry riverbeds, and the holes fill up with water. These holes are then used by all other animals in the area. Which of the following most accurately describes how the loss of elephants would affect this ecosystem?
Biodiversity would increase, as more species evolved.
Biodiversity would remain the same, but population sizes would increase.
Biodiversity would decrease, since few species could tolerate living with less available water.
Biodiversity would not change, although there would be increased predation by lions.
- 9. Multiple Choice
Zebra mussels were first discovered in the Great Lakes thirty years ago and have since spread to lakes throughout the region. Zebra mussels reproduce quickly and have few natural predators.
What will most likely happen to other native mussel species in the Great Lakes region?
Native species will begin to interbreed with zebra mussels.
Native species populations will decrease in areas with large zebra mussel populations.
Individuals of the native species will mutate to become more sililar to zebra mussels.
Individuals of the native species will mutate to become less similar to zebra mussels/.
- 10. Multiple Choice
Which of these relationships is most correct?
High Biodiversity leads to Low Sustainability
Low Biodiversity leads to High Sustainability
High Biodiversity leads to High Sustainability
Biodiversity and Sustainability are not related
- 11. Multiple Choice
Deer are introduced into a grassland ecosystem and their population increases considerably. If the deer population continues to grow, which is the MOST likely outcome for the ecosystem?
Biodiversity would increase, and sustainability would decrease
Biodiversity would increase, and sustainability would increase
Biodiversity would decrease, and sustainability would increase
Biodiversity would decrease, and sustainability would decrease
- 12. Multiple Choice
Which of these is a threat to the survival of an ecosystem?
Competition among some consumer populations
Less biomass at higher levels of the food web
A shrinking variety of animal and plant species
Predator-prey population cycles
- 13. Multiple Choice
Why is a reduction in biodiversity due to loss of plant populations especially destructive to an ecosystem?
Plants are primary producers
Plans have the most biomass
Plants are resistant to disease
Plants are part of the food web
- 14. Multiple Choice
Which of these explains why an
ecosystem is healthy when it has a variety of species?
An increased number of species allows for fewer food chains
A larger number of species reduces competition for abiotic resources
An increased number of species contributes to greater chances for adaptability
A larger number of species allows for greater diversity in interdependence
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