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- 1. Multiple Choice
Which of the following changes is most likely to occur if the sparrow population decreases? Use the food web
The fox population decreases
The hawk population increases
The grasshopper population competes less with the praying mantis population
The hawk population and the fox population prey more heavily on grasshoppers.
- 2. Multiple Choice
If an ecosystem undergoes primary succession, which of the following disturbances likely occurred?
A farmer removed his crops from the dirt
A tornado has occurred
A volcano has erupted covering the land with lava
A forest fire has occurred
- 3. Multiple Choice
Which of the below is a true statement?
Ecological succession is the process ecosystems undergo to rebuild themselves after a disturbance.
Primary succession occurs only if soil remains in the area.
Secondary succession occurs only if no soil remains in the area.
Pioneer species and climax community have similar meanings.
- 4. Multiple Choice
Which of the following would be the first animal to return to an area after a major disturbance.
lion
buffalo
herbivorous insect
wolf
- 5. Multiple Choice
Which of the below is the pioneer species for an ecosystem that is experiencing primary succession?
Small Grasses
Lichen and Moss
- 6. Multiple Choice
When an ecosystem contains many different species, there are usually a high number of links in its food web. How does this affect the sustainability of the ecosystem?
Typically, if one link in the food web is removed, the ecosystem will no longer exist.
Typically, if one link in the food web is added, the ecosystem will destabilize.
Typically, if one link in the food web is removed, the ecosystem will remain stable.
Typically, if one link in the food web is added, the ecosystem will change it's location.
- 7. Multiple Choice
Sustainability is defined as the ability of an ecosystem to survive over time. How does biodiversity affect the sustainability of an ecosystem?
Biodiversity allows processes that take place in the ecosystem to occur only once.
Biodiversity allows processes that take place in the ecosystem to occur in an irregular pattern.
Biodiversity allows processes that take place in the ecosystem to occur in a regular pattern.
Biodiversity allows processes that take place in the ecosystem to stop occurring.
- 8. Multiple Choice
Biodiversity affects the sustainability of an ecosystem by —
always increasing competition for limited resources within the ecosystem.
always decreasing competition for limited resources within the ecosystem.
allowing the ecosystem to survive many changes.
preventing the ecosystem from surviving many changes.
- 9. Multiple Choice
The partial food web shows five different organisms that are found in a prairie ecosystem. If the producers in a food web were removed, which of the following changes would most likely occur?
The entire food web would collapse over time.
The food web would depend on the decomposers for energy
The consumers would begin making energy for the food web
The populations of the remaining organisms in the food web would increase.
- 10. Multiple Choice
Which of the following classifies the mouse in the prairie ecosystem?
producer
primary consumer
secondary consumer
carnivore
- 11. Multiple Choice
Which of the following classifies the snake in the prairie ecosystem?
Autotroph
Producer
Primary Consumer
Heterotroph
- 12. Multiple Choice
How does organic material affect a garden?
It takes nutrients our of the soil
It allows for more plants to grow
it kills the plants in the garden
it attracts more animals
- 13. Multiple Choice
There are 13 species of finches found on the Galápagos Islands. These finches have a wide variety of food sources and beak shapes. There is one genetically similar species of finch found on the South American mainland. Which genetic trait has changed the most between the South-American finch and the three types found on the Galápagos Islands?
beak shape
eye color
food sources
geographic location
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