WorksheetsBiodiversity
Total questions: 20
Worksheet time: 15mins
the variety of life in the world or in a particular habitat or ecosystem
biodiversity
demography
carrying capacity
poaching
a species that is not native to a particular region
endemic
exotic
endangered
extinct
species that are native to and found only within a limited area
endemic
exotic
endangered
extinct
a species at risk, but not yet endangered
endangered
exotic
endemic
threatened
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
Which of the following would be most effective in slowing the loss of biodiversity?
creating large parks/preserves in biodiversity hotspots
requiring every country to maintain a seed bank
In what part of the world are the greatest number of extinctions occurring?
in deserts
in the Arctic
in tropical rain forests
The United States laws that protect endangered species:
are much weaker than the legal protections in most other countries.
are considered to be the strongest in the world.
According to biologists, what percentage of species have become or are expected to become extinct between 1900 and 2100?
1%
10%
25%
60%
The level of biodiversity that involves a variety of habits and communities is _____ diversity.
ecosystem
population
genetic
species
The ecosystem approach to conservation is partly based on the idea that:
a healthy biosphere requires intact ecosystems.
human needs are of secondary importance.
What level of biodiversity is most commonly equated with the overall concept of biodiversity?
genetic
ecosystem
species
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
Biodiversity is important to keep an area (biome) healthy. In this example "Food Web A" is sustainable. Why is sustainability important for an ecosystem in "Food Web A".
If one organism is removed the food web can still operate (work) with little or no negative effect.
If an organism is removed the food web will collapse and will affect the environment.
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.
The lionfish is a venomous fish found primarily in the Red Sea and the Indian Ocean. In the 1990s, lionfish were accidentally released into the Atlantic Ocean, where they found abundant resources and favorable environmental conditions. Which of the following scenarios is most likely to result in the lionfish having a major impact on the communities into which they were introduced?
With no natural predators, the lionfish population will become very large.
Some native species of invertebrates will develop a resistance to lionfish venom.
Which habitat exhibits the greatest biodiversity?
A habitat with 15 different species with about 300 individuals each
A habitat with 10 different species with about 75 individuals each
