BIO 1108 CHAPTER 47 EXAM QUESTIONS
AND ANSWERS A+ GRADED
The niche reflects
the biological and nonbiological factors that determine where an organism lives and how
it functions.
the fundamental niche
is the full range of physical conditions and food resources that permit an organism to
live.
The realized nich
is the actual range of habitats where an organism lives, and it is often smaller than the
fundamental niche because of competition, predation, and other interactions between
species
Competition is
a form of antagonism that occurs when two individuals of the same or different species
use the same limited resource.
Species can compete
for food, space, mates, or other resources.
Competition promotes resource partitioning
which occurs when two co-occurring species overlap in resource use and as a result
one changes its resource use.
Predators and parasites
can reduce competition by limiting the population sizes of successful competitors.
An ecological community
consists of all the organisms living in one place.
Species that have a large influence on the composition of a community
disproportionate to their numbers are known as keystone species.
Physical disturbances, such as a storm or drought,
can reshape communities.
Succession
is the predictable order of species colonization and replacement in a new or newly
disturbed patch of habitat
An ecosystem
is the community and physical habitat in which the organisms live.
Carbon cycles through ecosystems
but energy is used and dissipated.
A food web describes
how carbon cycles through ecosystems, and a trophic pyramid describes how energy
flows through ecosystems.
Because of energy lost to heat, work, and the inefficiencies of consumers, each
trophic level in an ecosystem generally has
about 10% of the biomass found at the next-lower level.
In most terrestrial ecosystems,
AND ANSWERS A+ GRADED
The niche reflects
the biological and nonbiological factors that determine where an organism lives and how
it functions.
the fundamental niche
is the full range of physical conditions and food resources that permit an organism to
live.
The realized nich
is the actual range of habitats where an organism lives, and it is often smaller than the
fundamental niche because of competition, predation, and other interactions between
species
Competition is
a form of antagonism that occurs when two individuals of the same or different species
use the same limited resource.
Species can compete
for food, space, mates, or other resources.
Competition promotes resource partitioning
which occurs when two co-occurring species overlap in resource use and as a result
one changes its resource use.
Predators and parasites
can reduce competition by limiting the population sizes of successful competitors.
An ecological community
consists of all the organisms living in one place.
Species that have a large influence on the composition of a community
disproportionate to their numbers are known as keystone species.
Physical disturbances, such as a storm or drought,
can reshape communities.
Succession
is the predictable order of species colonization and replacement in a new or newly
disturbed patch of habitat
An ecosystem
is the community and physical habitat in which the organisms live.
Carbon cycles through ecosystems
but energy is used and dissipated.
A food web describes
how carbon cycles through ecosystems, and a trophic pyramid describes how energy
flows through ecosystems.
Because of energy lost to heat, work, and the inefficiencies of consumers, each
trophic level in an ecosystem generally has
about 10% of the biomass found at the next-lower level.
In most terrestrial ecosystems,
