1
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QBA 1 Review Set Questions and Answers
(100% Correct Answers) Already Graded
A+
autotroph [ Ans: ] an organism that collects its energy from
sunlight or inorganic substances to produce food
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heterotroph [ Ans: ] an organism that gets its energy
requirements by consuming other organisms (organisms includes
plants)
herbivore [ Ans: ] an organism that eats only plants, such as a
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cow or a rabbit
carnivore [ Ans: ] an organism that preys on other heterotrophs,
such as wolves, lions and lynxes
omnivore [ Ans: ] an organism that eats both autotrophs (plants)
and heterotrophs (animals), such as a bear or human
detritovore [ Ans: ] an organism that eats dead matter to return
nutrients to the soil, air and water to be ursed
decomposer [ Ans: ] An organism that breaks down wastes and
dead organisms
trophic level [ Ans: ] each step in a food web or chain
food chain [ Ans: ] a simple model that shows how energy flows
through an ecosystem
food web [ Ans: ] a model most often used to represent the
feeding relationships in an ecosystem because there are many
pathways, it shows a complex flow of energy through an
ecosystem
biomass [ Ans: ] the total mass of living matter at each trophic
level that decreases as each trophic level rises
, 2
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energy [ Ans: ] the relative amount of energy available at each
trophic level
10% Rule [ Ans: ] Only 10% of the energy in one trophic level gets
passed onto the next trophic level, 90% is lost to the environment
in the form of heat
Joules [ Ans: ] the unit of measurement used to represent energy
in an ecosystem
primary consumer [ Ans: ] An organism that eats producers
producer [ Ans: ] a synonym for an autotroph, an organism that
makes its own energy using sunlight
secondary consumer [ Ans: ] An organism that eats primary
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consumers
tertiary consumer [ Ans: ] An organism that eats secondary
consumers
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conservation of energy [ Ans: ] the principle that states energy
cannot be created nor destroyed
sediment [ Ans: ] a material deposited by water, wind or glaciers
littoral zone [ Ans: ] a shallow zone in a freshwater habitat where
light reaches the bottom and nurtures plants
limnetic zone [ Ans: ] In a lake, the well-lit, open surface waters
farther from shore.
profundal zone [ Ans: ] a region of freshwater where sunlight
does not reach, below the limnetic zone in very deep lakes
plankton [ Ans: ] An organism that floats on the water.
intertidal zone [ Ans: ] the narrow band of coastline between the
levels of high tide and low tide
photic zone [ Ans: ] Portion of the marine biome that is shallow
enough for sunlight to penetrate.
aphotic zone [ Ans: ] permanently dark layer of the oceans
below the photic zone
For Expert help and assignment solutions, +254707240657
QBA 1 Review Set Questions and Answers
(100% Correct Answers) Already Graded
A+
autotroph [ Ans: ] an organism that collects its energy from
sunlight or inorganic substances to produce food
© 2025 Assignment Expert
heterotroph [ Ans: ] an organism that gets its energy
requirements by consuming other organisms (organisms includes
plants)
herbivore [ Ans: ] an organism that eats only plants, such as a
Guru01 - Stuvia
cow or a rabbit
carnivore [ Ans: ] an organism that preys on other heterotrophs,
such as wolves, lions and lynxes
omnivore [ Ans: ] an organism that eats both autotrophs (plants)
and heterotrophs (animals), such as a bear or human
detritovore [ Ans: ] an organism that eats dead matter to return
nutrients to the soil, air and water to be ursed
decomposer [ Ans: ] An organism that breaks down wastes and
dead organisms
trophic level [ Ans: ] each step in a food web or chain
food chain [ Ans: ] a simple model that shows how energy flows
through an ecosystem
food web [ Ans: ] a model most often used to represent the
feeding relationships in an ecosystem because there are many
pathways, it shows a complex flow of energy through an
ecosystem
biomass [ Ans: ] the total mass of living matter at each trophic
level that decreases as each trophic level rises
, 2
For Expert help and assignment solutions, +254707240657
energy [ Ans: ] the relative amount of energy available at each
trophic level
10% Rule [ Ans: ] Only 10% of the energy in one trophic level gets
passed onto the next trophic level, 90% is lost to the environment
in the form of heat
Joules [ Ans: ] the unit of measurement used to represent energy
in an ecosystem
primary consumer [ Ans: ] An organism that eats producers
producer [ Ans: ] a synonym for an autotroph, an organism that
makes its own energy using sunlight
secondary consumer [ Ans: ] An organism that eats primary
© 2025 Assignment Expert
consumers
tertiary consumer [ Ans: ] An organism that eats secondary
consumers
Guru01 - Stuvia
conservation of energy [ Ans: ] the principle that states energy
cannot be created nor destroyed
sediment [ Ans: ] a material deposited by water, wind or glaciers
littoral zone [ Ans: ] a shallow zone in a freshwater habitat where
light reaches the bottom and nurtures plants
limnetic zone [ Ans: ] In a lake, the well-lit, open surface waters
farther from shore.
profundal zone [ Ans: ] a region of freshwater where sunlight
does not reach, below the limnetic zone in very deep lakes
plankton [ Ans: ] An organism that floats on the water.
intertidal zone [ Ans: ] the narrow band of coastline between the
levels of high tide and low tide
photic zone [ Ans: ] Portion of the marine biome that is shallow
enough for sunlight to penetrate.
aphotic zone [ Ans: ] permanently dark layer of the oceans
below the photic zone
