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- 1. Multiple Choice
Decomposer organisms break down dead organisms, providing energy to carnivores
true
false
- 2. Multiple Choice
What is composed of several food chains in an ecosystem that intersect and depend on one another?
niche
feeding level
energy pyramid
food web
- 3. Multiple Choice
What is the ultimate source of energy in any food chain?
the sun
producers
consumers
decomposers
- 4. Multiple Choice
Which organisms can be found at the first, or lowest, trophic level?
herbivores
carnivores
heterotrophs
autotrophs
- 5. Multiple Choice
Herbivores eat only meat.
true
false
- 6. Multiple Choice
Food flows along a food chain from consumers to producers to decomposers.
true
false
- 7. Multiple Choice
Which statement describes an autotroph?
It is an organism that makes its own food.
It is an organism that eats other organisms.
It is an organism that eats decaying matter.
None of the above.
- 8. Multiple Choice
Which situation is a biotic factor operating within an ecosystem?
the kind of climate in a given region
carnivores that eat other animals
the concentration of hydrogen gas in the air
the rate of water flow in a body of water
- 9. Multiple Choice
Weather (such as rain) and soil conditions are considered to be part of the ____________ factors of an ecosystem.
biotic
antibiotic
abiotic
biomass
- 10. Multiple Choice
All the nonliving things in an environment are called the ________ factors.
abiotic
biotic
ecological
inorganic
- 11. Multiple Choice
A certain plant needs moisture, carbon dioxide, oxygen light, and minerals to survive. This scenario shows that a living organism depends on
biotic factors
abiotic factors
symbiotic relationships
carnivore-herbivore relationships
- 12. Multiple Choice
All are considered to be abiotic factors EXCEPT
moisture
air currents
predators
temperature
- 13. Multiple Choice
During a long period when there is no rainfall, a mountain lion may temporarily leave its usual hunting territory to drink from a farm pond. To what is this behavior probably due?
its need to find different foods to eat
the change in an abiotic factor in its environment
its need to find a new habitat
the change in a biotic factor in its environment
- 14. Multiple Choice
What is an example of a biotic factor?
water
grass
soil
- 15. Multiple Choice
Which of these phrases describes the biotic factors of an ecosystem?
the number of individual organisms in each trophic level of an ecosystem
any living part of an environment
an organism that eats only meat
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