WorksheetsThe Biosphere Review
Total questions: 13
Worksheet time: 7mins
What role do decomposers play in an ecosystem
fossilize dead animals
break down dead organisms and return their nutrients to the nutrient cycles
increase biomass of a trophic level
combine with consumers to create new limiting nutrients
Each of the following is an abiotic factor in the environment EXCEPT
temperature
soil
sunlight
plant life
What is a highly organized, structured environment in which all parts live in a delicate balance.
Population
Biosphere
Ecosystem
Community
The prefix a- means?
adjective former
land, earth
record, writing
not, without, lacking, deficient
The number and VARIETY of organisms in a given area is called its ______________.
Biosphere
Population
Community
Biodiversity
What is the leading cause of species extinction?
overpopulation
disease
competition for resources
habitat destruction
Which trophic level signifies the top of the food chain?
producer
decomposer
primary consumer
apex predator
How does a keystone predator influence its ecosystem?
they control population sizes of other organisms
they helps increase biodiversity in the ecosystem
they fill a specific niche that no other organism could occupy
all of the options are correct
Analyze the food web in the image. If all of the grasshoppers were to suddenly die off from a disease, what would be the outcome?
Grass populations would increase
Birds populations would decrease
Grain populations would increase
All of the options are possible outcomes
What does the arrow signify in a food chain?
Transfer of energy
What eats what
How many organisms are present
How much food an organism needs
Which of the following is an example of a threat to the biodiversity of an ecosystem?
Habitat loss and fragmentation
Competition from invasive species
Global climate change
Human population growth and consumption
All of these are examples of threats to an ecosystems biodiversity
Why is biodiversity important?
Everything in an ecosystem depends on other organisms
It makes the ecosystem prettier
Biodiversity isn't all that important
Biodiversity helps an animal hide from predators
What is the ultimate source of energy for all ecosystems?
Producers
Consumers
Apex predators
The Sun
