Download A) a population B) a community C) an ecosystem D) the biosphere 1

1. The diagram below represents many species of plants
and animals and their surroundings.
What does the diagram best represent?
A) a population
C) an ecosystem
B) a community
D) the biosphere
2. The portion of Earth in which all life exists is known as
A) the climax stage
C) a population
B) the biosphere
D) a biotic community
4. Which statement most accurately predicts what would
happen in the aquarium shown below if it were tightly
covered and maintained in natural light for one month?
A) The water temperature would rapidly decrease.
B) The process of respiration in the snail would
decrease.
C) The rate of reproduction of the fish would be
affected.
D) The organisms would probably survive because
materials would cycle.
5. Base your answer to the following question on A pond
ecosystem is represented in the diagram below.
3. Which level of biological organization includes the
greatest total number of species?
A) community
C) population
B) ecosystem
D) biosphere
Energy for this ecosystem originally comes from
A) water
C) sunlight
B) consumers
D) plants
6. Abiotic factors that could affect the stability of an
ecosystem could include
A)
B)
C)
D)
hurricanes, packs of wolves, and temperature
blizzards, heat waves, and swarms of grasshoppers
droughts, floods, and heat waves
species of fish, number of decomposers, and supply
of algae
7. A group of organisms within a given area capable of
interbreeding and producing fertile offspring under
natural conditions is called
A) an ecosystem
C) a food web
B) a community
D) a population
8. Base your answer to the following question on The diagram below shows organisms in and around a pond.
Which ecological term refers to all the organisms shown in the diagram?
A) heterotroph
B) community
C) population
9. Two species of animals with a similar appearance live in
the same habitat but do not compete for food. This is
because they most likely
A)
B)
C)
D)
D) producer
11. The feeding niches of three bird species are shown in
the diagram below.
reproduce at different times of the year
are the same size
occupy different ecological niches
are active at night
10. Competition between two species occurs when
A) mold grows on a tree that has fallen in the forest
B) chipmunks and squirrels eat sunflower seeds in a
garden
C) a crow feeds on the remains of a rabbit killed on
the road
D) a lion stalks, kills, and eats an antelope
What is the advantage of these different feeding niches
for the birds?
A)
B)
C)
D)
less competition for food
fewer abiotic resources for each bird species
fewer biotic resources for each bird species
less energy available as the birds feed higher in the
tree
12. Researchers have reported that the number of different
species of fish found in certain areas of the ocean has
been greatly reduced over the past 50 years. This
situation is an example of
A)
B)
C)
D)
a loss of biodiversity
an increase in ecological succession
a lack of differentiation
an increased carrying capacity
13. The diagram below represents a cycling of materials.
Which row in the chart below shows the substances
represented by X and Y?
A) 1
B) 2
C) 3
D) 4
14. In an ecosystem, which component is not recycled?
A) water
C) oxygen
B) energy
D) carbon
15. An ecosystem is represented below.
What would make this ecosystem self-sustaining?
A)
B)
C)
D)
the organisms labeled A outnumber the organisms labeled B
the organisms labeled A are equal in number to the organisms labeled B
the type of organisms represented by B are eliminated
materials cycle between the organisms labeled A and the organisms labeled B
16. The exchange of respiratory gases and the synthesis of
organic compounds by autotrophs are processes that are
directly involved in the
19. The process illustrated in the sequence below occurs
constantly in the biosphere.
A) maintenance of soil fertility in an ecosystem
B) transfer of materials in the
carbon-hydrogen-oxygen cycle
C) transfer of nitrogen through a food chain
D) distribution of minerals in an ecosystem
17. Which processes are involved in the water cycle?
A) respiration and photosynthesis, only
B) transpiration and excretion, only
C) respiration, photosynthesis, evaporation, and
condensation, only
D) respiration, photosynthesis, transpiration,
excretion, evaporation, and condensation
18. The soil on a farm can very quickly become depleted of
the minerals essential to plants because harvesting of
crops can interfere with the
A)
B)
C)
D)
reproductive cycles of animals
recycling of inorganic compounds
flow of energy
transport of groundwater
Which type of organism is most likely represented by X
?
A) decomposer
C) herbivore
B) producer
D) carnivore
20. Organisms from a particular ecosystem are shown
below.
Which statement concerning an organism in this
ecosystem is correct?
A) Organism 2 is heterotrophic.
B) Organism 3 helps recycle materials.
C) Organism 4 obtains all of its nutrients from an
abiotic source.
D) Organism 5 must obtain its energy from organism
1.
21. Puppies are often given medicine to eliminate
roundworms from their intestines. These worms
consume some of the food the puppies have digested.
The worms and the puppies represent a relationship
known as
A)
B)
C)
D)
predator-prey
consumer-producer
parasite-host
autotroph-heterotroph
22. A symbiotic relationship exists between two organisms
of different species. If only one organism benefits from
the relationship and the other is not harmed, the
relationship is known as
A) commensalism
C) parasitism
B) mutualism
D) saprophytism
23. Base your answer to the following question on the diagram below and on your knowledge of biology.
Which term belongs in area A?
A) mutualism
B) prey
C) saprophytism
24. A relationship between a consumer and producer is best
illustrated by a
A)
B)
C)
D)
snake eating a bird
tree absorbing minerals
fungus breaking down wastes
deer eating grass
25. The removal of nearly all the predators from an
ecosystem would most likely result in?
A) an increase in the number of carnivore species
B) a decrease in new predators migrating into the
ecosystem
C) a decrease in the size of decomposers
D) an increase in the number of herbivores
D) host
26. A food web is represented below.
When water used to cool machinery is returned to a river, it raises the river water temperature.
This causes a sharp decline in small invertebrate populations. Based on the food web, a likely consequence
of this change would be
A) an increase in the number of clams
C) an increase in the number of crabs
B) a decrease in the number of water plants
D) a decrease in the number of crayfish
27. The diagram below represents a food web.
Which species would most likely be a decomposer?
A) A
B) B
C) C
D) D
Base your answers to questions 28 and 29 on
the food web below and on your knowledge of biology.
28. A decrease in the grass population will most
immediately decrease the available energy for the
A) mouse
C) snake
B) hawk
D) frog
29. Which organisms are carnivores?
A) grass and trees
C) deer and mountain lion
B) mouse, rabbit, and cricket
D) frog, snake, and hawk