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WorksheetsCommunities and Ecosystems
Total questions: 48
Worksheet time: 25mins
Observe the food chain above. Which organism’s population would increase if finches were removed from the ecosystem?
Grass
Grasshopper
Snake
Hawk
An animal that eats only plants is called a -
carnivore
omnivore
insectivore
herbivore
What is a part of the food chain that makes its own food and nutrients?
consumer
producer
omnivore
sun
Which of the following organisms is a herbivore?
fox
ladybug
butterfly
snake
How many predators does the squid have?
3
4
2
1
How might a lack of sunlight disrupt the food web?
It would cause consumers to consume less.
It would prevent decomposers from decomposing matter.
It would prevent producers from producing nutrients
It would not disrupt the food web at all.
How are primary consumers different from secondary consumers?
Primary consumers eat only plants; secondary consumers eat other consumers.
Primary consumers eat other consumers; secondary consumers eat only plants.
Primary consumers eat plants and other consumers; secondary consumers eat plants and decompose matter.
. Primary consumers eat plants and decompose matter; secondary consumers eat plants and other consumers.
This organism is most likely:
A primary consumer
A secondary consumer
A decomposer
A producer
The word "primary" means "first."
If that's true, what does primary consumer mean?
Hint: look carefully at the food chain!
the first organism in a food chain
the first organism that consumes something else for energy
A worm is a/an
autotroph
heterotroph
(True or False)- Autotrophs are organisms that can undergo Photosynthesis to make their own nutrients such as plants and trees.
True
False
What are the two categories scientists use to organize organisms based on their main source of energy?
the sun
photosynthesis
autotroph
heterotroph
cellular respiration
A decomposer does not have a mouth and ...
eats meat/animals/heterotrophs only to get its energy
eats dead or living tissues by using chemicals
eats both plants/autotrophs and meat/animals/heterotrophs to get its energy
eats dead/decaying organisms only to get its energy
Classify the animal based on its energy sources. A panda gets its energy by eating bamboo (plants) for its energy. (Choose all that apply)
Autotroph
Heterotroph
Carnivore
Herbivore
Omnivore
What are the two main saprotrophs on Earth?
vultures
bacteria
worms
fungus
What are the two classifications of decomposers?
omnivore
detritivore
saprotroph
consumer
Detritivores have mouth parts.
True
False
Without detritivores and decomposers dead organisms would break down in other ways.
True
False
What limits the length of a food chain in an ecosystem?
The size of the individual organisms
Competition between organisms
The loss of energy between trophic levels
Natural selection
What is the classification of an organism that is able to make organic compounds from inorganic nutrients?
Autotroph
Consumer
Detritivore
Saprotroph
What is lost between trophic levels and cannot be recycled?
Heat
Nitrogen
Carbon compounds
Biomass
Which organism can best be described as a saprotroph?
A fungus that digests its food externally and absorbs the products of digestion
A beetle that feeds by ingesting the dung of other animal species and digesting its food internally
A single-celled eukaryote that is able to photosynthesize and consumes smaller organisms by endocytosis
A giraffe that feeds by ingesting leaves from an acacia tree
The diagram shows the food web for an aquatic ecosystem in which letters R–Z represent individual species. Which organism is a tertiary consumer?
Organism T
Organism U
Organism W
Organism Y
The Silver Springs feed into the Silver River in Florida. The diagram shows a pyramid of energy for the Silver Springs ecosystem. The units are kJ m–2 y–1. What do level I and level III represent in the pyramid of energy?
l sunlight, lll secondary consumer
l producer, lll tertiary consumer
l producer, lll secondary consumer
l primary consumer, lll tertiary consumer
The Australian pitcher plant (Cephalotus follicularis) is a green plant that traps and feeds on flies and other live insects. What is this plant’s mode of nutrition?
Producer and saprotroph
Autotroph and detritivore
Autotroph and heterotroph
Consumer and saprotroph
Animals in the highest trophic level of a food chain will often be the largest in body size but will be few in numbers. What accounts for the small numbers?
Food eaten by animals at the highest trophic level has a lower energy content per gram
Energy losses through the food chain
Conversion of heat energy into chemical energy
Biomass of producers is small
Which of the following trophic levels would have the LEAST amount of available energy?
Producers
first order consumers (primary consumers)
second order consumers (secondary consumers)
third order consumers (tertiary consumers)
What do the arrows in the food chain indicate about the flow of energy in an ecosystem?
energy is continuously recycled by the organisms in an ecosystem
energy flows in one direction in an ecosystem from producers to consumers
more of the available energy in an ecosystem is given to large animals than to small animals
organisms at the end of the food chain receive more energy than those at the beginning
Approximately how much energy is available to the secondary consumers in this energy pyramid?
10 kcal/m2/year
100 kcal/m2/year
1,000 kcal/m2/year
5,000 kcal/m2/year
What is the efficiency of the primary consumer? (round to the nearest tenth of a percent)
(a)
What is the efficiency of the secondary consumer? (round to the nearest tenth of a percent)
(a)
What is the efficiency of the tertiary consumer? (round to the nearest tenth of a percent)
(a)
True/False: Based on the efficiencies you calculated for the previous three questions, this ecosystem is probably terrestrial.
True
False
Check all of the answers below that are HETEROTROPHS
grass
bacteria
consumer
autotroph
decomposer
Check all of the answers below that are HETEROTROPHS
venus fly trap plant
vulture
apex predator
chemosynthetic organism
phytoplankton
What type of ecological pyramid is shown?
biomass
numbers
productivity / energy
Which is the correct, balanced equation for PHOTOSYNTHESIS?
C6H12O6 + 6O2 + 6H2O + sunlight --> 6CO2 + 12H2O
C6H12O6 + 6O2 + 6H2O + ATP--> 6CO2 + 12H2O
6CO2 + 12H2O + sunlight --> C6H12O6 + 6O2 + 6H2O
C6H12O6 + 6O2 + 6H2O --> 6CO2 + 12H2O + ATP
Which is the correct, balanced equation for CELLULAR RESPIRATION?
C6H12O6 + 6O2 + 6H2O + sunlight --> 6CO2 + 12H2O
C6H12O6 + 6O2 + 6H2O + ATP--> 6CO2 + 12H2O
6CO2 + 12H2O + sunlight --> C6H12O6 + 6O2 + 6H2O
C6H12O6 + 6O2 + 6H2O --> 6CO2 + 12H2O + ATP
Which of the following organisms are most at risk for the bio magnification of Mercury?
phytoplankton
zooplankton that eat the phytoplankton
minnows that eat the zooplankton
large fish that eat the minnows
Why do pollutants BIOACCUMULATE?
because the concentration grows as you go higher up the food chain.
because the organism cannot break down / digest the pollutant once it is ingested
because the pollutant is in low quantities in the environment
because the pollutant is easy to digest
