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WorksheetsThe Web of Life: Producer to Predator
Total questions: 10
Worksheet time: 20mins
It can be concluded that without decomposers in an ecosystem, _____.
Scavengers would take over the function of decomposers
Energy transfers in food chains would become more efficient
Insects would become dominant
Life would not be sustainable
The physical environment and environmental conditions in a biome determine, to a large degree, which living organisms are found there
True
False
Competition between species in an ecosystem implies that _____.
There are more predators than prey
Mutualism is not possible
No two species can occupy the exact same niche
Habitats have a limitless supply of available niches
The relationship between bees and some flowers is an example of _____.
Commensalism
Parasitism
Mutualism
Altruism
Excess carbon dioxide in the lower atmosphere acts like a(n) ____, which traps solar energy and leads to the greenhouse effect.
Funnel
Mirror
Electrical wire
Glass pane
What would most likely happen in the nitrogen cycle if denitrifying bacteria did not perform their role?
The major source of nitrates would be from lightning
Chemical feralization would be needed to add more nitrates to the cycle
Nitrate-forming bacteria would take over the affected ecosystems
Too much nitrogen would be bound up in the form of nitrates
If the predator-prey relationship between lions and zebras, when the populations of zebras is great, the population of lions will _____.
Decrease
Increase
Stay the same
Die off
Human survival is independent of other species
False
True
Why are there always more producers than consumers in an ecosystem?
Plants do not carry out enough photosynthesis to supply the needed oxygen to primary consumers
The sun cannot supply enough energy to support many predators
Energy is lost in food chains so many secondary consumers cannot be supported
Many consumers would contribute too much carbon dioxide to the carbon cycle
What is a major difference between the nitrogen and phosphorus cycles?
Only nitrogen exists as a gas for part of the cycle
Soil erosion removes only phosphorus from its cycle in terrestrial ecosystems
Only nitrogen is added to its cycle from fertilizers
Animals excrete only phosphorus-containing compounds to add to the cycle
