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- 1. Multiple Choice
Overall, all the interactions between organisms in ecosystems...
Keep ecosystems & populations unstable and random
Keep ecosystems & populations stable and balanced
- 2. Multiple Choice
In which type of interaction does one animal eat another for energy and nutrients?
Competition
Parasitism
Predation
Mutualism
- 3. Multiple Choice
Which of the following is NOT a symbiotic relationship?
Competition
Commensalism
Mutualism
Parasitism
- 4. Multiple Choice
What term describes organisms striving for the same limited resources?
Competition
Predation
Mutualism
Commensalism
- 5. Multiple Choice
Commensalism is a symbiotic relationship in which what occurs between the organisms?
both organisms are harmed
one benefits, the other is unaffected
one benefits, the other is harmed
one benefits by eating the other
- 6. Multiple Choice
Fleas living within a mammal's fur describes this type of relationship:
Competition
Mutualism
Predation
Parasitism
- 7. Multiple Choice
Which interaction type is it when different male lions strive to find territories?
Intraspecific Competition
Interspecific Competition
Commensalism
Mutualism
- 8. Multiple Choice
A crab is protected from fish when an anemone rides on its shell. The anemone gets more food.
Commensalism
Competition
Predation
Mutualism
- 9. Multiple Choice
This interaction occurs when lions, cheetahs, and leopards all need the same food source.
Intraspecific Competition
Interspecific Competition
Predation
Mutualism
- 10. Multiple Choice
Orchid vines are skinny and grow on the trunk of trees to get more light and space with no negative effect.
Mutualism
Commensalism
Parasitism
Competition
- 11. Multiple Choice
When the population of predators gets too high...
Prey pop. will increase--> predator pop. will increase
Prey pop. will decrease--> predator pop. will increase
Prey pop. will decrease--> predator pop. will decrease
It depends on the biome
- 12. Multiple Choice
As you go up the levels of the trophic pyramid, which of the following is true?
There are more organisms and more energy
There are more organisms and less energy
There are less organisms and more energy
There are less organisms and less energy
- 13. Multiple Choice
Parasites and predators help maintain ecosystem stability because...
They increase the population of all organisms so ecosystems become diverse
They decrease the population of certain organisms to ensure no species overpopulates
They increase the survival of all species
Any of the above are possible
- 14. Multiple Choice
How does competition between organisms maintain ecosystem stability and biodiversity?
The winners of the competition increase in population size and dominate the ecosystem
Both organism populations become stronger and larger as a result of the competition
The population sizes are kept in check due to limited resources
All of the above are true
- 15. Multiple Choice
Which of the following interactions is improperly labeled?
Predation + -
Mutualism + +
Competition - 0
Commensalism + 0
All of the above are actually labeled correctly
- 16. Multiple Choice
Damage to which trophic level would have the LEAST immediate negative impact on other populations?
Tertiary consumers
Secondary Consumers
Primary Consumers
Producers
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