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WorksheetsEcology
Total questions: 25
Worksheet time: 1hrs 12mins
An example of a producer is a
fungus.
animal.
plant.
person.
The approximate amount of energy that is transferred between each trophic level is:
10%
0.1%
90%
It totally depends on the ecosystem.
What does a pyramid of numbers compare?
the number of individual organisms at each trophic level
the number of individuals in each population
the number of predators and prey in an ecosystem
the number of different populations at each trophic level
Which of the following examples would result in an inversion of a pyramid of numbers?
a tree with thousands of spiders
a forest of trees with a small herd of deer
a tree with a spotted owl
a forest of trees with a pack of wolves
Why are there generally a maximum of five trophic levels?
It's far easier to draw a pyramid that way.
Because energy is lost at each level, there isn't enough energy left to support any more consumers.
Generally a top predator is so fierce it has no predators and therefore can rule the top trophic level without fear.
There simply is not a word beyond quaternary.
BTW the word after quaternary is quinary (always read all the options in multiple choice questions)
What is biomass?
the total dry weight of organisms in an ecosystem
the total weight of organisms in an ecosystem
the total dry weight of producers in an ecosystem
the total weight of animals in an ecosystem
Which one is most likely the pyramid of biomass?
A
B
If only 10% of an organism's energy is available for the next trophic level, what happens with the other 90% of the energy?
It is destroyed after it is used up
It is used for life processes like movement, creating offspring producing waste or lost as body heat
It is used to grow plants
It is lost completely as body heat
Which statement best describes what will happen if the population of herbivores in the community decreases?
the population of foxes will increase
the population of hawks will increase
the population of rabbits will increase
the population of meadow plants will increase
In this energy pyramid, which organisms have the most energy available?
Producers
Carnivores
Herbivores
Top Predator
In this energy pyramid, which organism has the least amount of energy available?
Producers
Herbivores
Carnivores
Top Predator
Some examples of biotic factors would be
trees
insects
bacteria
all of the above
Which of the following is an abiotic factor that plants depend on?
seed-eating birds
insect pollinators
ants building their nests in trees
nutrients in the soil
Which choice is an example of a relationship between an abiotic factor and a biotic factor?
sun shining on a tree
bacteria infecting an organism
a lion eating a zebra
a bird eating seeds
Is soil a biotic or abiotic factor?
biotic
abiotic
Is competition within a species a biotic or abiotic factor?
biotic
abiotic
Is disease a biotic or abiotic factor?
biotic
abiotic
