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- 1. Multiple ChoiceScientists think people have directly caused the extinction of some species through ______________.habitat destructionpoachingpollutionAll of these
- 2. Multiple ChoiceThe major cause of extinction is ____________________.habitat fragmentationhabitat destructionpollutionpoaching
- 3. Multiple Choice
Which of the following is likely to be affected by a growing human population?
amount of land for agriculture (farming)
amount of clean water
amount of air pollution
all of the above
- 4. Multiple Choice
Humans' need for more space leads to
creation of nonrenewable resources
population growth
lack of fresh water
destruction of habitats
- 5. Multiple Choice
In some communities, forests are cleared through burning, and the deforested land is used for farming. Which of these is a negative consequence of this practice?
Less sunlight reaching the ground
Increased availability of soil nutrients
Decreased plant and animal diversity
Greater access to water for plants and animals
- 6. Multiple Choice
Deer are introduced into a grassland ecosystem and their population increases considerably. If the deer population continues to grow, which is the MOST likely outcome for the ecosystem?
Biodiversity would increase, and sustainability would decrease
Biodiversity would increase, and sustainability would increase
Biodiversity would decrease, and sustainability would increase
Biodiversity would decrease, and sustainability would decrease
- 7. Multiple Choice
Which of these explains why an
ecosystem is healthy when it has a variety of species?
An increased number of species allows for fewer food chains
A larger number of species reduces competition for abiotic resources
An increased number of species contributes to greater chances for adaptability
A larger number of species allows for greater diversity in interdependence
- 8. Multiple Choice
Which of these living things in a grassland ecosystem depend on the presence of a variety of bacteria and other microorganisms in the soil?
Worms Only
Green plants only
Plants and animals only
All the organisms in the ecosystem
- 9. Multiple Choice
Which change in the environment would have a negative effect on the survival of a species in an ecosystem?
Increase in the population of prey
Introduction of a competing species
Decrease in the population of predators
Increase in genetic diversity of the species
- 10. Multiple Choice
New Zealand is home to many flightless birds, such as the kiwi, which build their nests on the ground. Over time, ground predators such as possums have been introduced. Which statement could be a possible effect on the kiwi?
Possums could eat the eggs and reduce the number of kiwi chicks
Kiwi could develop the ability to fly short distances to escape possums
Possums could make the nests their home so the kiwi have to build new nests
Kiwi could lay three times as many eggs to ensure the survival of their chicks
- 11. Multiple ChoiceWhich of the following describes the number of species and abundance of each species that live in a particular location?genetic diversityspecies diversityecological diversity
- 12. Multiple ChoiceWhere will you find the most biodiversity?in the south polein the north polenear the equatorin the oceans
- 13. Multiple Choice
Soil erosion can increase when humans remove trees and other vegetation from an area. What is this process called?
decomposition
conservation
deforestation
urbanization
- 14. Multiple Choice
Changes to an ecosystem's biodiversity can have a direct effect on humans because humans-
inhabit all areas of the Earth's ecosystems
use minerals from the ground to make things
depend on the Earth's natural resources
- 15. Multiple Choice
A reduction in the variety of pollinating insects would negatively affect the plant populations that depend on them. Which of the following describes the most serious impact this would have on humans?
Plants that don't need insects to pollinate would take over most habitats
there would be a decrease in the availability of honey
crops that humans use for food would be diminished
- 16. Multiple Choice
deforestation is
the action of clearing a wide area of trees
the number of different species of plants and animals in an area
site for disposal of garbage
- 17. Multiple Choice
Introducing non-native species can
cause a decrease in biodiversity
can harm native species
Can decrease biodiversity and harm native species
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