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an atmosphere gas the increases when fossil fuels are burned off
carbon dioxide
evidence of excessive fertilizer use
algal bloom
a final and stable community
climax community
a type of succession that occurs on abandoned farmland
old-field succession
a gradual process of change and replacement of the types of species in a community
ecological succession
a common type of succession that occurs on a surface where an ecosystem has previously existed
secondary succession
a consumer that eats only producers is called a
herbivore
term that is used to describe a linear sequence in which energy is transmitted from one organism to the next as it is eaten
food chain
term that describes many feedings relationships that are possible in an ecosystem
food web
which organism would occupy the level on an energy pyramid with the most energy
a.bobcat
b.bird
c.grasshopper
d.carrot
d. carrot
in the carbon cycle, where do the producers get their carbon?
the atmosphere
where are fossil fuels locates?
a.on the surface of the earth
b.deep within the earth
c.beneath the ocean floor
d.all of the above
d. all of the above
how do lichens contribute to primary succession?
lichens begin to break down rock to form soil
where would you most likely find nitrogen-fixing bacteria?
on the roots of legumes
what type of vegetation would you expect to find on a abandoned farm that has been undisturbed by humans for 150 years?
tall, mature trees
consumers are organisms that
a.eat only other animal species
b.get solar or other energy indirectly
c.are also known as self-feeders
d.occupy an ecosystem's lowest energy level
a. eat only other animal species
or
b. get solar or other energy indirectly
the energy consumed by organisms
a. can be stored in fat and sugar molecules
b. remains constant at all trophic levels
c. undergoes magnification in food chains
d. is not partially lost during digestion
a. can be stored in fat and sugar molecules
which is a large reservoir of nitrogen that is unusable by most organisms?
a. soil
b. atmosphere
c.ocean
d. space
what kind of organism obtains energy directly from the sun?
producers
what percentage of energy is stored in an organism for the next to use
10%
which does not contain carbon from the bodies of plants and animals that died millions of years ago?
a. coal b.oil
c.natural gas d.phosphate salts
d. phosphate salts
which gas makes up 78% of our atmosphere and can only be used by plants when transformed by bacteria first
nitrogen
which plant is likely to be a pioneer species
a. lichen b. grass
c.shrub d. oak tree
a. lichen
in deep ocean systems, what escapes from the cracks in the floor and is used by bacteria to make their own food
hydrogen sulfide
a process within the cell of an organism that uses glucose and oxygen to produce carbon dioxide, water, and energy
cellular respiration