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o Use each of the following terms in a
separate sentence: symbiosis, mutualism, commensalism, and parasitism.
Complete each of the following sentences by choosing the correct term
from the word bank.
The environment includes __
factors including water, rocks, and light.
o The environment also includes __ ,
or living, factors.
o A community of organisms and their
is called a(n) __
For each pair of terms, explain how the
meanings of the-terms differ.
o community and population
o ecosystem and biosphere
o producers and consumers
relationship, the tick is the __
the dog is the __ .
a. parasite, prey
c. parasite, host
b. predator, host
d. host, parasite
a. when population size is decreasing.
b. when predators eat their prey.
c. when the population is small.
d. when a population is approaching
the carrying capacity.
G Nature's
recyclers are
a. predators.
c. producers.
b. decomposers.
d. omnivores.
G A beneficial
association between coral
and algae is an example of
a. commensalism.
c. mutualism.
b. parasitism.
d. predation.
(£) The process by which energy moves
through an ecosystem can be represented by
a. food chains.
b. energy pyramids.
c. food webs.
d. All of the above
does the base of an
energy pyramid represent?
o A tick sucks blood from a dog. In this
Chapter 1
light are likely to be limiting factors
e Which organisms
u tigLe thai e
o Resources such as water, food, or sun-
of Living Things
a. producers
c. herbivores
b. carnivores
d. scavengers
fD Which
of the following is the correct
order in a food chain?
a. sun-7producers-7herbivores-7scav-
cngcrs-ecarni vores
b. sun -7consumerS-7 preda tors-o parasites-ohosts
c. sun-eproducers-sdecomposers-e
d. sun -oproducers-e herbivores-ecarnivores-sscavengers
e Predicting Consequences
CD Remoras and sharks have a relationship that is best described as
a. mutualism.
c. predator and prey.
b. commensalism. d. parasitism.
CD Describe how energy flows through
food web.
G Explain how the
food web changed
when the gray wolf disappeared from
National Park.
Some biologists think that certain species, such as
alligators and wolves, help maintain
biological diversity in their ecosystems. Predict what might happen to
other organisms, such as gar fish or
herons, if alligators were to become
extinct in the Florida Everglades.
f! Expressing Opinions
Do you think
there is a carrying capacity for
humans? Why or why not?
G) How are the
competition between two
trees of thesame species and the competition between two different species
of trees similiar?
Use the food pyramid below to answer
the questions that follow.
CD How do limiting
factors affect the
carrying capacity of an environment?
En What is coevolution?
f) 'Concept Mapping Use the following
terms to create a concept map: herbivores, organisms, producers, populations,
ecosystems, consumers, communities, carnivores, and biosphere.
G Identifying
Relationships Could a bal-
anced ecosystem contain producers
and consumers but not decomposers?
Why or why not?
fl) According to the
food pyramid, are
there more prairie dogs or plants?
/fD What
level has the most energy?
ED Would an energy pyramid
such as this
one exist in nature?
ED How could you change this pyramid
look like one representing a real ecosystem?
Chapter Review