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18 Cards in this Set
- Front
- Back
35. Define decomposer.
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Decomposers are organisms that get energy by breaking down the remains of dead organisms
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36. Why should there be many more prairie dogs than coyotes in a prairie ecosystem? (Short Answer)
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It takes many prairie dogs to support just one coyote since very little energy is transferred to the coyote when it eats the prairie dog. So it takes a large number to support an entire population of coyotes.
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37. In the antarctic ecosystem, what animal are krill a source of food?
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COD, penguin, crabeater seal
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38. Give an example of a food chain.
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Algae>>>Krill>>>Cod>>>Seal>>>>Whale
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39. Energy in a food chain flows from one organism to another as each organism
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Eats the one below it.
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40. How does a decomposer respond to biomass? (Short Answer)
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Decomposers break down biomass in a process called decay. During decay, decomposers break down biomass, releasing energy and stored nutrients.
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29. Energy is ______________ at each level of an energy pyramid.
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Lost
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30. When a mouse hides under a rock during a rainstorm, what part of its environment is it responding to?
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Nonliving
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31. What do fungi and other decomposers break down?
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Biomass
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32. As decomposers break down the remains of other organisms, what do they put back into the ecosystem?
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Nutrients
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33. What does a grass plant use most of the energy it gets from the sun on?
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Its own life processes
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34. How do decomposers benefit an ecosystem?
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Decomposers benefit an ecosystem by
1. Returning nutrients to the soil and 2. Breaking down dead organisms. |
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23. What do food webs show?
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Food webs show that energy flows in many ways through an ecosystem
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24. Name 2 nonliving parts of an ecosystem to which organisms may respond.
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1. Air temperature
2. Rain |
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25. What links together in a community to form food webs?
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Food chains
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26. Name three things that that organisms can respond to.
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1. Other organisms
2. The nonliving environment 3. Themselves |
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27. The amount of available energy becomes __________________ at each higher level in a food chain.
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Smaller
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28. If you yawn when you are tired, what type of stimulus are you responding to?
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Internal stimulus
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