lilmomma07 asked: 1.Which phrase best describes the focus of ecology?
A.individual organisms
B.individual cells
C.interactions among organisms
D.interactions among cells
2.Which level of organization in ecology is a major regional or global community of organisms?
A.an ecosystem
B.population
C.community
D.biome
3.An ecologist counts weeds to monitor their populations. Which of the following best describes the ecologist’s methods?
A.modeling
B.observation
C.experimentation
D.hypothesizing
4.Wind is considered to be an abiotic factor because it
A.is not related to biodiversity.
B.is a nonliving thing.
C.is in equilibrium.
D.is not in any ecosystem.
5.A keystone species is a species that
A.goes unnoticed if its numbers decrease.
B.alters an area by building bridges and dams.
C.leads to a decrease in an area’s biodiversity.
D.has an unusually large impact on its ecosystem.
6.An organism that makes its own food is called a
A.consumer.
B.producer.
C.heterotroph.
D.chloroplast.
7.The basis for the energy in an ecosystem is provided by
A.consumers.
B.heterotrophs.
C.chemosynthesis.
D.producers.
8.Chemosynthesis is the process in which organisms
A.form carbohydrates using chemicals.
B.get energy by eating other organisms.
C.make chemicals that absorb sunlight.
D.use energy from the sun to form carbohydrates.
9.Decomposers are important to ecosystems because they
A.return vital nutrients to the environment.
B.are producers.
C.capture energy from the Sun.
D.can be omnivores.
10.A food chain contains oak trees (producer), mice (herbivore), black rat snakes (carnivore), and bald eagles (carnivore). How many trophic levels does this food chain have?
A.one
B.two
C.three
D.four
11.The water cycle, in which water moves from the atmosphere, to the surface, below ground, and back, is also called the
A.biogeochemical cycle.
B.oxygen cycle.
C.hydrologic cycle.
D.nitrogen cycle.
12.Fossil fuels are part of which of the following cycles?
A.oxygen
B.carbon
C.nitrogen
D.phosphorus
13.Where does most of the phosphorus cycle take place?
A.in the atmosphere
B.at and below ground level
C.on fungi near plant roots
D.close to rocky terrain
14.A group of organisms of the same species that live in the same area is called a(n)
A.community.
B.population.
C.biome.
D.ecosystem.
15.Which of the following is the best example of an observation study?
A.a quadrat sample
B.a laboratory experiment
C.a computer program
D.a population model
16.Which of the following parts of Figure 13.2 is an example of a biotic factor?
A.sunlight
B.soil
C.deer
D.river
17.Which phrase best describes biodiversity?
A.the number of individuals in an ecosystem
B.the amount of biomass in an ecosystem
C.the amount of available energy in an ecosystem
D.the number of species in an ecosystem
18.If a keystone species is removed from an ecosystem,
A.abiotic and biotic factors can be affected.
B.only biotic factors can be affected.
C.only abiotic factors can be affected.
D.neither abiotic nor biotic factors can be affected.
19.Organisms that feed on dead or decaying matter are called
A.herbivores.
B.carnivores.
C.omnivores.
D.detritivores.
20.Almost all autotrophs get their energy from
A.sunlight.
B.hydrothermal pools.
C.decaying matter.
D.producers.
21.Which model shows the number of organisms at each trophic level in an ecosystem?
A.biomass pyramid
B.food web
C.pyramid of numbers
D.food chain
22.A specialist would be an organism that
A.eats only one kind of food.
B.eats only plants.
C.eats only meat.
D.eats a variety of foods.
23.Networks of feeding relationships can be shown in a
A.venn diagram.
B.bar graph.
C.food web.
D.food tree.
24.What does the diagram in Figure 13.1 show?
A.the nitrogen cycle
B.the water cycle
C.the oxygen cycle
D.the carbon cycle
25.Bacteria are important in the nitrogen cycle because they
A.help convert nitrogen into a form that organisms can use.
B.respire, returning carbon dioxide into the atmosphere.
C.decay and eventually form fossil fuels.
D.produce sugars that plants can use
Thank YOU!!
All were correct except for…
#2 - D
#12- B
#18- A
#21- C
#24- D
Thank you verrrrrry much!
Evelyn
