Question

1. Which of the following statements is true?
Biodiversity provides additional resources that raise the carrying capacity of an
ecosystem.
Biodiversity increases an ecosystem’s ability to withstand changes.
Biodiversity makes an ecosystem more difficult to destroy.
Biodiversity provides additional sources of food for the weakest organisms in an
ecosystem.
2. A salamander is a keystone species in a forest ecosystem with high biodiversity. This species migrates from woodland areas to a local stream to reproduce. If a road is built that cuts off the woodland areas from the stream, what effect will this have on the forest ecosystem?
no effect because biodiversity is high
no effect as long as the forest is undergoing succession
a negative effect because the salamander’s impact on other species is so large
a positive effect because the road will cause the salamander to remain closer to thestream
3. Which of the following determines the carrying capacity of a particular population by an
ecosystem?
keystone species
pioneer species
limiting factors
renewable resources
4. Use of which of the following does not contribute carbon dioxide to the environment?
refrigerator
charcoal grill
computer
bicycle
5. Why does buying food that is grown in your local area help prevent loss of biodiversity?
Local plants and animals are less apt to be endangered.
Local species require less energy to grow.
Reducing drilling for oil to supply transport fuel reduces the impact on many species.
Reducing the purchase of distant species means they are saved from being used for
food.
6. Which of the following pairs of words correctly completes the blanks in the sentence below? Depletion of has been halted by a ban on the manufacturing of

the ozone layer, chlorofluorocarbons.
acid rain, carbon dioxide.
fossil fuels, gasoline.
global warming, methane.
7. Which of the following is a form of pollution triggered by formation of a gas, and can have dramatic effects on the health of a coral reef ecosystem?
fog
pesticides
acid rain
oil spill