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WorksheetsTEK 7.10B: Biodiversity This took to long
Total questions: 25
Worksheet time: 15mins
Which best describes a type of organism that lives on, and feeds off of plants or other organisms?
saprophytes
autotrophs
omnivores
tracheophytes
Which factor is most likely to cause the number of rabbits living in an area to increase?
less water
lack of shelter
fewer predators
limited food
Which type of organism converts wastes and dead materials into nutrients that can be used by plants?
carnivore
decomposer
herbivore
producer
Species that are clearly critical to the functioning of an ecosystem are known as
biodiversity
keystone species
main species
native species
Species that are clearly critical to the functioning of an ecosystem are known as
biodiversity
keystone species
main species
native species
An exotic species is
a species that is not native to a particular region
a newly discovered species in a particular region
a genetically modified species in a particular region
a species that is native to a particular region
Succession that occurs in areas that previously didn't support life, such as on rocks or ice
tangential succession
primary succession
secondary succession
quaternary succession
A population is
a group of similar species in different areas
a group of the same species in the same geographic area.
a group of several species in the same geographic area
a group of several species along with their abiotic factors in a small area.
a species that is not native to a particular region
endemic
exotic
endangered
extinct
How many species are estimated to be living on Earth?
between 10,000 and 100,000
between 1 and 2 million
between 500,000 and 1 million
between 10 and 50 million
In what part of the world are the greatest number of extinctions occurring?
in deserts
in the Arctic
in tropical rain forests
Why is biodiversity important to ecosystems?
It helps populations adapt to ecological changes.
It increases at each level of the food chain.
Where are many critical biodiversity hotspots located?
islands, tropical rain forests, and coastal areas
cities and developed areas of the world
Food Web B is an example of...
Low biodiversity and low sustainability. If the producer dies then all the food web will suffer.
High biodiversity and high sustainability. If an organism is removed the food web will continue with no effect.
A keystone species is a species whose presence
Is the main reason a community exists
Provides food for all other species in a community
Is an indicator of environmental health
Influences the population size of many other species in its community
Is always at the top of the trophic levels as a top predator
A keystone species is a species whose presence
Is the main reason a community exists
Provides food for all other species in a community
Is an indicator of environmental health
Influences the population size of many other species in its community
Is always at the top of the trophic levels as a top predator
