which of the following is the most complete example of an ecosystem
a. all of the brook trout in a 500 square hectare river drainage system
b. all of the plant animals and decomposers that live on a dairy farm
c. a pond and all of the plant and animal species that live in it
d. the complicated interactions of the different plant and animal species in the woods near umaine
campus
e. all of the organisms and their physical environment in and around the stillwater river - Correct Answer
e. all of the organisms and their physical environment in and around stillwater river
Owls eat rats, mice, shrews, and small birds. Assume that, over a period of time, an owl consumes 5,000
J of animal material. The owl loses 2,300 J in feces and owl pellets and uses 2,600 J for cellular
respiration. What is the production efficiency of this owl?
a. 0.02%
b. 1%
c. 4%
d. 10%
e. 40% - Correct Answer c. 4%
when considering biogeochemical cycles a major reservoir for both bioavailable carbon and nitrogen
is....
a. the open ocean
b. the atmosphere
c. the earths core
d. rocks
e. clouds - Correct Answer b. the atmosphere
, For most terrestrial ecosystems, pyramids composed of species abundances, biomass, and energy are
similar in that they have a broad base and a narrow top. The primary reason for this pattern is that
_____.
a. secondary consumers and top carnivores require less energy than producers
b. at each step energy is lost from the system because of the second law of thermodynamics
c. as matter passes through ecosystems some of it is lost to the environment
d. biomagnification of toxic materials limits the secondary consumers and top carnivores
e. top carnivores and secondary consumers have a more general diet than primary producers - Correct
Answer b. at each step energy is lost from the system because of the second law of thermodynamics
which trophic level is the most vulnerable to going extinct?
a. producer level
b. primary consumer level
c. secondary consumer level
d. tertiary consumer level
e. decomposer level - Correct Answer d. tertiary consumer level
through time the lineage that led to modern whales shows a change from four limbed land animals to
aquatic animals with two limbs that function as flippers this change is best described by...
a. natural selection
b. natural philosophy
c. reductionism
d. the heirarchy of the biological organization of life
e. cell theory suggesting that fewer cells are better than more cells - Correct Answer a. natural selection
Darwins finches collected from each of the different galapagos islands provided evidence that
a. all of the brook trout in a 500 square hectare river drainage system
b. all of the plant animals and decomposers that live on a dairy farm
c. a pond and all of the plant and animal species that live in it
d. the complicated interactions of the different plant and animal species in the woods near umaine
campus
e. all of the organisms and their physical environment in and around the stillwater river - Correct Answer
e. all of the organisms and their physical environment in and around stillwater river
Owls eat rats, mice, shrews, and small birds. Assume that, over a period of time, an owl consumes 5,000
J of animal material. The owl loses 2,300 J in feces and owl pellets and uses 2,600 J for cellular
respiration. What is the production efficiency of this owl?
a. 0.02%
b. 1%
c. 4%
d. 10%
e. 40% - Correct Answer c. 4%
when considering biogeochemical cycles a major reservoir for both bioavailable carbon and nitrogen
is....
a. the open ocean
b. the atmosphere
c. the earths core
d. rocks
e. clouds - Correct Answer b. the atmosphere
, For most terrestrial ecosystems, pyramids composed of species abundances, biomass, and energy are
similar in that they have a broad base and a narrow top. The primary reason for this pattern is that
_____.
a. secondary consumers and top carnivores require less energy than producers
b. at each step energy is lost from the system because of the second law of thermodynamics
c. as matter passes through ecosystems some of it is lost to the environment
d. biomagnification of toxic materials limits the secondary consumers and top carnivores
e. top carnivores and secondary consumers have a more general diet than primary producers - Correct
Answer b. at each step energy is lost from the system because of the second law of thermodynamics
which trophic level is the most vulnerable to going extinct?
a. producer level
b. primary consumer level
c. secondary consumer level
d. tertiary consumer level
e. decomposer level - Correct Answer d. tertiary consumer level
through time the lineage that led to modern whales shows a change from four limbed land animals to
aquatic animals with two limbs that function as flippers this change is best described by...
a. natural selection
b. natural philosophy
c. reductionism
d. the heirarchy of the biological organization of life
e. cell theory suggesting that fewer cells are better than more cells - Correct Answer a. natural selection
Darwins finches collected from each of the different galapagos islands provided evidence that
