WorksheetsESS 3.3 threats to biodiversity
Total questions: 25
Worksheet time: 18mins
During which century did the Dodo become extinct?
16th
17th
18th
19th
Choose which of the following pairs of criteria would be taken into account when determining the conservation status of a species:
Population size and position in the food chain
Specialisation of a species and the number of scientific publications on the species’ population.
Geographic range of a species and the extent of the use of a species’ image in the media.
Quality of a species habitat and the range of monetary funds set up to protect that species.
What does IUCN stand for?
(a)
The aim of IUCN are.............
to evaluate whether a species is under threat
to provide information and analysis on the status of species
to see the trends and threats to species in order to conserve them
raise some fund
species that are employed as symbols by conservationist organisation to raise awareness of a particular environmental problem called
keystone species
flagship species
native species
umbrella species
The document produced by the IUCN that catalogues all endangered species is called (a)
The dodo is an example of a large flightless bird that has become extinct. What was the reason for its extinction?
It was hunted by humans for meat.
It was a poor competitor, unable to respond well to predation.
Loss of forest habitat.
All three reasons contributed to the extinction of the dodo.
All species have a natural extinction rate, which is referred to as the background extinction rate. What is the approximate value of this rate (how many species go extinct per year) ?
1 - 100 species per year
100 - 1,000 species per year
1,000 - 10,000 species per year
It is impossible to estimate the rate because of the lack of reliable data.
Does a large body make an animal more vulnerable to extinction?
Yes, because large mammals are of more economic value to humans and therefore more vulnerable to poaching.
Yes, because the inefficiency of energy transfers along the food chain makes large animals rare.
No, body size does not influence an organism’s vulnerability to extinction.
No, a large body makes animals less prone to extinction.
The Giant panda is an example of a habitat specialist. What does this term signify?
It is a top predator in its habitat.
It is a species that occurs only in one place in the world.
It is a species that has specific dietary requirements.
It is a species that is very-well suited to its environment and therefore not prone to extinction.
Factors contributing to the extinction of the Tasmanian Tiger included:
Competition from dingoes and dogs.
Introduction of animals to the island by humans, such as dogs, monkeys,
Population fragmentation caused by human induced fires.
Possible disease epidemic in the 1920s which also affected the dingo population.
based on IUCN red list , species that only exist in captivity can be categorized as....
Extinct
extinct in the wild
critically endangered
endangered
based on IUCN red list , species that have very high risk to extinct can be categorized as
Extinct
vulnerable
critically endangered
endangered
Hawksbill Turtle is in high demand for cultural (used in religious ceremony) and social reasons(symbol of social status) so its categorized as
Extinct
Critically endangered
Vulnerable
Recovery species
Actions that taken to reduce capture and trading of Lear’s MaCaw are...
monitoring the birds habitat
Planting Licuri palms and protecting them from livestock grazing and trampling.
Enforcing legislation resulting in the arrest of poachers,
breeding in captivity and re-introduction them into its natural habitat
Breaking up large areas of habitat into smaller pieces is called...
destruction
fragmentation
conservation
habitat loss
When taken to a new habitat, non-native plants often threaten native plants of the new habitat. Why do they do this
Non-native plants are able to mutate rapidly
Non-native plants cause native animals to relocate
Non-native plants are able to be used for medicine
Non-native plants compete with native plants for resources
Which of these following species were extinct
Giant Panda
African elephant
Dusky seaside sparrow
Golden lion thamarin
Which group of organism that least indentified and named specoes
mammals
algae
molluscs
insects
The golden lion tamarin monkey is an example of
a species of least concern
an extinct species
a recovering species
vulnerable
Estimates of the total number of species on Earth are not particularly accurate because:
They are determined by mathematical models.
Not all species have been discovered.
Lack of funding for scientific research in this area in poorer countries.
All of these
Consider three different species of wild cats. Populations of species A are spread evenly across Africa, species B is scattered around the whole of Australia but its population is relatively large in numbers and the population of species C lives on a single island in the Southern-Asian region. Which of the three species is the most prone to extinction?
(a)
How many mass extinction periods can be identified in the geological record?
(a)
What is the reason, if any, for the conflict between biodiversity conservation and development of LEDCs?
LEDCs are in need of economic and technological development which puts further pressures on how to conserve biodiversity and ensure that this development is sustainable
There is no conflict between those two initiatives.
LEDCs do not tend to value biodiversity in general.
LEDCs do not want to accept monetary funding from MEDCs to organise effective, localised conservationist actions.
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Which of the following would be an ecological arguement for conserving the Amazon rain forest?
The large biodiversity of the forest has encouraged eco-tourism.
There are many undiscovered plants that could cure future deseases.
The indigenous tribes that live off the forest should be allowed to preserve their culture and traditions.
The forest is large enough to regulate the climate.
