A)members of a single species in the biosphere
B)members of a given genus inhabiting a given
area
C)members of a single species inhabiting a
given area
D)abiotic and biotic factors in a given location
36.In ecology, a population is defined as all the
A)drastic modifications to the environment
B)interrelationships and interdependencies
among organisms
C)limited biodiversity
D)gradual changes in the climate
37.In order for an ecosystem to remain stable there must
be
A)plants and gravel
B)fish, water, and snails
C)fish, plants, and snails
D)water and gravel
38.An aquarium ecosystem is shown below.
A community in this aquarium consists of the
A)They are all of the same species.
B)They all require the same type of food.
C)They are part of a community.
D)They are abiotic factors in a forest.
39.A moss-covered log is overturned by a hungry bear
looking for insects to eat. The bear disturbs an ant
colony, and some chipmunks leave the hollow log to
search for another home in the forest. Which
relationship do these organisms have with each
other?
A)communityB)population
C)biosphereD)species
40.All the plants and animals interacting in a given area
make up a
A)biosphere, ecosystem, community
B)biosphere, community, ecosystem
C)community, ecosystem, biosphere
D)ecosystem, biosphere, community
41.Which sequence shows increasing complexity of
levels of ecological organization?
A)hiding from predators
B)greater reproductive success
C)locating new sources of food
D)reduced population growth
42.A male frigatebird displays to the female by inflating
its large red throat sac, throwing its head back,
vibrating its wings, and producing a "drumming"
sound with its throat sac. For the frigatebird, this
behavior has most likely resulted in
A)A deer outruns an attacking wolf.
B)A deer, during the winter, consumes tree bark.
C)A deer and rabbit consume grass in a field.
D)A deer and a rabbit are both startled by a hawk
flying overhead.
43.Which statement best describes a situation where
competition occurs in an ecosystem?
A)Organisms that feed on different foods in the
same area of an ecosystem fill the same niche.
B)Organisms that live in the same ecosystem
can occupy different niches in the ecosystem.
C)Different species feeding in the same
ecosystem will eventually compete with each
other, eliminating all the species except one.
D)Different species living in the same area of an
ecosystem usually have the same physical
characteristics.
44.Members of a bird-watching club observed the
activities of three species of birds for an entire
spring and summer. They noticed that the different
species fed at different heights in the same pine tree.
Which ecological concept is supported by this
observation?