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- 1. Multiple ChoiceExamples of a producerfrogalgaewormmouse
- 2. Multiple Choice
The science of ecology is best defined as the study of
the classification of plants and animals
the interactions of living organisms and their environment
technology and its effects on society
weather and its effects on food production in the ocean
- 3. Multiple Choice
What is the primary source of energy in this environment?
cellular respiration in the plants
energy from minerals in the soil
fossil fuels
solar energy
- 4. Multiple Choice
One of the best ways to represent the interdependence of all of the organisms in this ecosystem is
an evolutionary tree
a food chain
an electrophoresis gel
a food web
- 5. Multiple Choice
Which statement is true for all of the organisms in the ecosystem represented in the diagram below?
They use energy to combine the inorganic molecules carbon dioxide and water into energy-rich organic compounds.
Stored energy cannot be used by these organisms as a source of energy for life processes.
Energy stored in inorganic molecules is released during cellular respiration in these organisms.
Energy is used by the organisms to obtain and transport materials, and to eliminate wastes.
- 6. Multiple Choice
A stable pond ecosystem would not contain
materials being cycled
oxygen
decomposers
more consumers than producers
- 7. Multiple Choice
For a natural ecosystem to be self-sustaining, many essential chemical elements must be
converted to energy
changed into fossil fuels such as oil and coal
permanently removed from the environment
cycled between organisms and the environment
- 8. Multiple Choice
Which statement best describes what is most likely to occur if an animal population grows larger than the carrying capacity of its environment?
The birth rate will increase.
Both the birth rate and death rate will decrease.
The death rate will increase.
Neither the birth rate nor the death rate will decrease
- 9. Multiple Choice
If the line did not stay around the carrying capacity, but continued to rise, which concept would this graph best illustrate?
environmental stability
genetic variety
behavioral change
overproduction
- 10. Multiple Choice
Which group of organisms is an example of a population?
leopard frogs in a stream
birds in Colorado
reptiles in the Sahara Desert
trees in a forest
- 11. Multiple Choice
Which sequence shows increasing complexity of levels of ecological organization?
biosphere, ecosystem, community
biosphere, community, ecosystem
community, ecosystem, biosphere
ecosystem, biosphere, community
- 12. Multiple Choice
Which statement best describes a situation where competition occurs in an ecosystem?
A deer outruns an attacking wolf.
A deer, during the winter, consumes tree bark.
A deer and rabbit consume grass in a field.
A deer and a rabbit are both startled by a hawk flying overhead.
- 13. Multiple Choice
An ecosystem will most likely remain stable is
it has more predators than prey
it has a high level of biodiversity
biotic factors decrease
finite resources decrease
- 14. Multiple Choice
What would most likely be the predominant life form found in stage I?
ferns
tracheophytes
mushrooms
pioneer species
- 15. Multiple Choice
These changes will most likely lead to a
stable ecosystem that can last for many years
loss of heterotrophs that cannot be recovered
long-term rise in environmental temperatures
forest consisting of only producers and decomposers
- 16. Multiple Choice
The stable stage that is established in an area as a result of the process of ecological succession is known as the
heterotroph community
pioneer stage
biotic stage
climax community
- 17. Multiple Choice
Which state of the ecosystem has the greatest long-term stability?
A
B
C
D
- 18. Multiple Choice
Which diagram best represents the cycling of respiratory and photosynthetic gases in green algae?
- 19. Multiple Choice
What is the most probable reason for the increasing predator population from day 5 to day 7?
an increasing food supply from day 5 to day 6
a predator population equal in size to the prey population from day 5 to day 6
he decreasing prey population from day 1 to day
the extinction of the yeast on day 3
- 20. Multiple Choice
Deer ticks are responsible for spreading Lyme disease. This organism, which feeds on the blood of warm-blooded organisms like mice, deer, and humans, is best described as a
predator
scavenger
parasite
host
- 21. Multiple Choice
Acacia trees provide food for a species of ant that lives on them. The ants defend the acacia tree from grasshoppers and beetles. This relationship between the ant and acacia tree is best described
commensalism
mutualism
parasitism
saprophytism
- 22. Multiple Choice
n a marine ecosystem, algae are able to use sunlight and inorganic materials to make their own food. Clams feed on the algae by filtering them out of the water.
In this ecosystem, the algae act as
decomposers
autotrophs
heterotrophs
scavengers
- 23. Multiple Choice
Which organisms are primary consumers?
grass, mice, and hawks
owls, snakes, and hawks
seeds, grass, and shrubs
songbirds, mice, and rabbits
- 24. Multiple Choice
Which statement best describes a function of the molds, bacteria, and yeasts in this ecosystem?
They convert light energy into chemical energy.
They carry out a food-making process, using inorganic raw materials
They break down dead organisms, releasing raw materials to the environment.
They act as catalysts to speed up the energy flow between organisms.
- 25. Multiple Choice
The best explanation for the decrease in the amount of energy transferred to each succeeding level is that much of the energy is
consumed by predators
released as heat
stored within inorganic materials
used in photosynthesis
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