Ecology Part 2: Question Preview (ID: 18310)


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The most common decomposers in an ecosystem are ____.
a) algae and worms b) grass and deer c) bacteria and fungi d) birds and trees
What is a trophic level in an energy pyramid?
a) the area that an organism lives b) the feeding level of an organism c) the resources and organism needs d) who the organism competes with
Which statement is true about energy pyramids?
a) There is more energy available at the secondary consumer level than at the producer level. b) There is more energy available at the tertiary consumer level than at the secondary consumer level. c) There is more energy available at the producer level than the primary consumer level. d) There is more energy available at the primary consumer level than at the producer level.
There is only ___ of energy available from one level up to the next in an energy pyramid.
a) 90% b) 50% c) 20% d) 10%
Water changing from a liquid to a gas (water vapor) is called ____.
a) evaporation b) condesation c) precipitation d) runoff
Water evaporating off of plants is called ____.
a) condensation b) precipitation c) runoff d) transpiration
All of the following add carbon dioxide to the atmosphere except ___.
a) photosynthesis b) respriation c) deforestation d) burning fossil fuels
During respiration ____ is taken out of the atmosphere and ___ is released to the atmosphere.
a) carbon dioxide, oxygen b) nitrogen, carbon dioxide c) oxygen, carbon dioxide d) oxygen, nitrogen
What fixes nitrogen gas in the atmosphere into nitrogen compounds that can be taken in by plants and animals?
a) bacteria and fungi b) bacteria and lightning c) fungi and plants d) plants and lightning
How do animals get nitrogen?
a) absorb it through the skin b) breath it in through lungs c) eat plants and animals d) animals don't need nitrogen
Plants and animals use nitrogen to ___.
a) make sugar b) make carbohydrates c) make proteins and nucleic acids (for DNA) d) transport water
The interaction of many food chains is a(n)
a) food web b) trophic level c) abiotic factor d) ecological balance
Animals that eat both plants and animals are ____.
a) herbivores b) carnivores c) omnivores d) decomposers
In what way do the organisms of the upper trophic levels have less energy than the organisms of the lower trophic levels?
a) Their food has less energy b) Their food has less concentrated energy c) Their bodies have less energy d) They have less energy available to them
The bottom of an energy pyramid is made up of which kind of organisms?
a) herterotrophs b) primary consumers c) secondary consumers d) autotrophs
How is carbon stored in the earth?
a) When a living thing dies its body becomes buried and compressed over time becoming a fossil fuel b) in the living tissues of organisms and in the atmosphere c) in rock strata where it is released by weathering in the form of nitrogen d) in the oceans
How does predation help prey populations?
a) Predation does not help prey populations and is a form of parasitism. b) Predation encourages mutualistic relationships to develp. c) Predation artificially limits populations and only prevents overcrowding. d) Predation naturally limits populations by preventing overcrowding and starvation.
All the populations living in an area are called a ____.
a) biosphere b) ecosystem c) community d) organism
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