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15 questions
1. What is one of the greatest threats to biodiversity on Earth?
habitat destruction
loss of drinking water
decrease in food supply
pollution
1. Why might an introduced animal species overrun native species in an ecosystem?
. Its population size is smaller than those of native species.
. It is more energy efficient, so it eats less food.
It is a predator of the native species.
It often has no natural enemies
Which of these is one cause of deforestation?
Urbanization
Buying a Christmas tree during the holidays
Overbreeding birds in the wild
Cutting down the tree in your backyard
When human-made chemicals and garbage find their way into nature and harm the air, soil, and water it is called
pollution
habitat destruction
overexploitation
climate change
The largest threat to biodiversity is
bacteria
fungi
humans
plants
Urbanization is
clearing of trees in a forested area
spread of desert like conditions due to actions of humans
large numbers of people moving to small areas
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