Chapter 3 Test B: Question Preview (ID: 2609)


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Which is most likely to be a limiting nutrient in a freshwater pond?
a) carbon b) phosphorus c) potassium d) nitrogen
What can happen after a lake receives a large input of a limiting nutrient?
a) Nitrogen compounds are recycled b) An algal bloom occurs c) Then concentration of oxygen drops below the necessary level d) Algae begin to die and decomposers take over
The simpliest grouping of more that one kind of organism in the biosphere is
a) a species. b) a population. c) a community. d) an ecosystem.
What animals eat both producers and consumers?
a) omnivores b) chemotrophs c) herbivores d) autotrophs
Only 10 percent of the energy stored in an organism can be passed on to the next trophic level. Of the remaining energy, some is used for the organism's life processes,
a) and the rest is eliminated as heat. b) and the rest is stored as fat. c) and the rest is stored as body tissue. d) and the rest is used in reproduction.
How is carbon stored in the biosphere?
a) in the atmosphere as carbon dioxide b) underground as fossil fuels and calcium carbonate rock c) in the oceans as dissolved carbon dioxide d) all of the above
The branch of biology dealing with interactions among organisms and between organisms and their environment is called
a) economy. b) ecology. c) recycling. d) modeling
Organisms need nutrients in order to
a) utilize hydrogen and oxygen., b) carry out nitrogen fixation. c) carry out essential life functions. d) recycle chemical compounds.
Which of the following is Not a basic method used by ecologists to study the living world?
a) observing b) classifying c) modeling d) experimenting
What is the term for each step in the transfer of energy and matter within a food web?
a) food pyramid b) energy path c) food chain d) trophic level
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