Producers in an ecosystem transfer all of their energy to primary-level consumers

True

or

False

False

Organisms at higher trophic levels tend to be fewer in

numbers than those at lower trophic levels

True

or

False

True

Detritivores are especially harmful to an ecosystem

True

or

False

False

A change in the number of predators in

a food web can affect an entire ecosystem

True

or

False

True

Omnivores feed only on primary producers

True

or

False

False

The lowest trophic level of any ecosystem is occupied

by the producers

True

or

False

True

Ecosystems include only the biotic factors in an area

True

or

False

False

Carbon is returned to the atmosphere by 

photosynthesis, combustion and erosion

True

or

False

False

When succession takes place in an area where there

has been previous growth, it is called secondary succession

True

or

False

True

Food chains usually begin with the primary producers

True

or

False

True

Nitrogen gas makes up about 79 percent

of the Earth's atmosphere

True

or

False

True

A community includes all the living

things within an area

True

or

False

True

Plants release water into the atmosphere

through transpiration

True

or

False

True

Biotic factors in a habitat includes the

nonliving as well as the living organisms

True

or

False

False

When an organism dies, the nutrients in its body

are immediately release into the atmosphere

or

are released by the action of decomposers

are released by the action of decomposers

[image]  How much energy is available to the organisms in level C?

10 percent of the energy in level B

90 percent of the energy in level B

10 percent of the energy in level B

[image]Level A is composed of...

carnivores

or

producers

Producers

[image]The diagram shows a(n)

food web

or

energy pyramid

energy pyramid

Which of the following is part of the nitrogen cycle?

conversion of nitrogen from decaying organisms into ammonia

or

All of the above

All of the above

Humans are affecting the carbon cycle by

burning fossil fuels

or

All of the above

All of the above

The physical location of an ecosystem in which a

given species lives is called a

habitat

or

tropical level

habitat

A relationship between a producer and

consumer is best illustrated by a

snake eating a bird

or

zebra eating grass

zebra eating grass

Coal, oil and natural gas...

are formed from decayed plants

or

All of the above

All of the above

Succession is...

the number of species living in an ecosystem

or

the regular progression of species replacement

in an environment

the regular progression of species replacement

in an environment

A group of organisms of different species living together in a particulare place is called a

Community

or

Population

Community

The total dry weight of the organisms in an

ecosystem is called

trophic level

or

biomass

biomass

The primary producers in a grassland ecosystem

would most likely be

grasses

or

algae

Grasses

Which of the following are detritivores?

worms

vultures

fungi

or

All of the above

All of the above

Producers

The diagram,which shows how energy moves through an ecosystem, is known as a:

habitat or foodweb

[image]

Food web

Lepopards seals are: herbivores or carnivores

[image]

carnivores

Which of the following types of succession would most

likely occur following a forest fire?

Primary succession

or

secondary succession

seconday succession

Nitrogen is a component of:

proteins

or

carbohydrates

proteins

Precipitatioin and evaporation are important

components of the

nitrogen cycle

or

water cycle

Water cycle

Because energy diminishes at each successive 

trophic level, few ecosystems can contain more than

four trophic levels

or

five trophic levels

four trophic levels

The process shown in the diagram is known as:

competitive exclusion or succession

[image]

Successioin

Ecology is the study of the interaction of living organisms:

and their communitites

or

with one another and their physical enironment

with one another and their physical environment

The paths of water, carbon, nitrogen, & phosphorus pass from the nonliving environment to living organisms and back to the nonliving environment in closed circles called

environcycles

or

biogeochemical cycles

biogeochemical cycles

An ecosystem consists of:

a community of organisms,

energy,

the soil, water and weather,

or

All of the above

All of the above