ecology1 flashcards
nonliving parts of an ecosystem
abiotic factors
nonliving parts of an environment are called__________.
abiotic factors
the biosphere extends from high in the _________ to the bottom of the oceans.
Atmosphere
the study of life
biology
the regions of the surface and atmosphere of the Earth where living organisms exist
biosphere
all living things on earth can be found in the _________ the potion of earth that supports life
Biosphere
living parts of an ecosystem
biotic factors
all the living organisms that inhabit an environment
biotic factors
Which organism is an omnivore?
Bird
Which organism belongs to more than one trophic level?
Bird
Animals lose water when they
Breathe and urinate
plants use _____________________ in photosynthesis to make carbon molecules
Carbon dioxide
decomposers break down the carbon molecules by feeding on other organisms and release ___________
carbon dioxide
one species benefits and the other species in neither benefited nor harmed by the relationship
commensalism
a group of interdependent organisms inhabiting the same region and interacting with each other
community
a collection of interacting populations.
Community
the struggle between organisms to survive in a habitat with limited resources
competition
occurs between organisms when resources are scarce.
Competition
__________ break down the carbon molecules of dead and decaying organisms
Decomposers
From which trophic levels are the organisms that decomposers feed on?
All trophic levels
the branch of biology concerned with the relations between organisms and their environment
ecology
a system formed by the interaction of a community of organisms with their physical environment
ecosystem
interactions among the populations and abiotic factors in a community.
Ecosystem
the specific conditions under which animals and plants can live
environments
the branch of biology called ecology is the scientific study of interactions among organisms and their ______
environments
Plants lose water to the air through
evaporation
an aquatic ecosystem.
marine
a terrestial ecosystem.
Forest
autotrophs and heterotrophs use carbon molecules for energy and ______
Growth
for example whales trees and ________ are biotic factors.
humans
Which organism is an herbivore?
insect
both species benefit from the other relationship
mutualism
the branch of biology called ecology is the scientific study of interactions among organisms and their environments including relationships between living and ________ things.
nonliving
when things are not alive they are
Nonliving
besides energy what moves through the organisms at each trophic level of an ecosystem
nutrients
Any single living thing
organisms
living organisms in our world are connected to other ___________ in a variety of ways.
Organisms
one species benefits from the relationship at the expense of the other species
parasitism
Which organism is an autotroph?
Plant algae plankton
a group of organisms of one species that interbreed and live in the same place at the same time.
Population
group of individuals of the same species that live in the same area
population
the water in the atmosphere is returned to the earth by
Precipitation
To what trophic level does a third-order heterotroph belong?
4th
ocean currents temperature and _______ are abiotic factors.
Soil
material in the top layer of the surface of the earth in which plants can grow
soil
Energy that is lost at each trophic level of an ecosystem is replenished by
sunlight
organisms of different species live together in a close permanent relationship
symbiosis
evaporation and condensation a part of the
water cycle
a habitat is the role of a species in a community T OR F
FALSE
a niche is the place where an organism lives its life T OR F
FALSE
a habitat can include only one niche T OR F
FALSE
it is an advantage for two species to share the same niche T OR F
FALSE
all organisms belong to only one food chain ? T or F
FALSE
habitat may change T OR F
TRUE
a species’ niche includes how the species meets its need for food and shelter T OR F
TRUE
the centipedes and worms that live under a certain log occupy the same habitat but have different niches. T OR F
TRUE
competition between two species is reduced when the species have different niches. T OR F
TRUE
