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WorksheetsEcology Review
Total questions: 10
Worksheet time: 20mins
The sequence that best illustrates the flow of energy through an ecosystem is
sunlight → plant → wolf → rabbit
plant → sunlight → rabbit → wolf
sunlight → plant → rabbit → wolf
wolf → rabbit → plant → sunlight
Many biotic factors affect individuals in a population. An example of an organism being directly affected by a biotic factor is
a squirrel cannot find a mate
a flood washes away a maple tree
a plant is in a dark room
a chipmunk finds a rock pile to use for a home
Which level of the pyramid below is correctly paired with the type of organism that would most likely be found at that level in an ecosystem?
Level A – producers
Level B – carnivores
Level C – herbivores
Level D – decomposers
The final consumers in many food webs are
autotrophs
hosts
herbivores
carnivores
Autotrophs differ from heterotrophs in that only autotrophs
require carbon dioxide for cellular respiration
release oxygen as a product of cellular respiration
synthesize nutrients using carbon dioxide and water
break down sugars to assemble other molecules
Which population would be most immediately affected by the removal of the lizard population?
sedges
algae
ants
centipedes
Which sequence of organisms represents a food chain within this food web?
tadpoles → algae → daphnia → back swimmers
sedges → ants → frogs → kookaburras
algae → daphnia → decayed material → bacteria
dragonflies → sedges → ants → centipedes
Which sequence best represents the flow of energy through an ecosystem?
Sun → green plants → herbivores → carnivores
Sun → herbivores → producers → consumers
green plants → carnivores → consumers → herbivores
consumers → carnivores → herbivores → producers
An ecosystem is self-sustaining as long as organisms have sufficient quantities of energy, oxygen, minerals, and water. When organisms die, some of these materials are recycled back to plants in the ecosystem primarily through the activity of
predators
decomposers
pathogens
parasites
Decomposers are necessary in a food chain because they
manufacture food by photosynthesis
return nutrients to the ecosystem
absorb energy from the Sun
produce organic nutrients
