Environmental Changes

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• B
• C
• D

• A
• B
• C
• D

Copper compounds are used to control the growth of algae and other aquatic plants. Copper interferes with photosynthesis in these organisms. What would be the most likely result of an accidental spill of these compounds in an aquatic environment?

• Fish would grow larger than usual
• Zooplankton would increase
• Plants would increase in size and decrease in number
• The plant populations would be reduced

• Mayflies that were previously abundant are no longer present in the stream
• Stone flies and midges thrive and compete for the same food source
• Large numbers of crayfish are suddenly dead
• Riffle beetles have become more abundant in the stream

• Less water available for absorbtion
• Less tissue available for plant growth
• Less energy available for reproduction
• Less soil available for leaf development

Insecticides are sprayed over a large area in an effort to reduce the number of grasshoppers that are eating the corn plants. How will this change affect this food chain? 

• The number of grasshoppers will increase
• The number of lizards will increase
• The number of lizards and hawks will decrease
• The number of grasshoppers, lizards, and hawks will decrease

all of the interacting members of the same species in an area 

• overpopulation
• community
• population
• environment

an increase in the number of individuals of a given species over what its ecosystem can sustain, often with both direct and indirect effects on the other organisms in the ecosystem

• population
• overpopulation
• perish
• impact

too much water in an area

• drought
• impact
• migration
• flood

too little water in an area

• drought
• carrying capacity
• change
• flood