bio 100 exam 1 UPDATED ACTUAL Exam
Questions and CORRECT Answers
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
Questions and CORRECT Answers
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
