BM2 Week 3 Review Flashcards
Why is biodiversity important to ecosystems?
It helps populations adapt to ecological changes.
What are major human causes of extinction today?
- Hunting and destroying habitats.
- Polluting and introducing non-native species.
Give a statement about surface water.
It makes up less than 1% of all water on Earth.
Most of the Earth’s fresh water is located where?
Solidified at the North and South Poles.
What is a way one person could conserve water?
Use a low-flow showerhead and take short showers.
What is an example of nonpoint-source pollution?
Runoff from agricultural feedlots.
When neighborhood residents noticed a large number of dead fish in a local creek, they traced the problem to a nearby gas station. It turned out that a tank of gasoline had developed a leak. This is an example of what kind of pollution?
Point-source pollution
What is a pollutant that is caused by poor sanitation and can lead to gastrointestinal infections?
Bacteria in food
Air pollution is a major health problem caused by the burning of fuels where?
- Vehicles
- Home furnaces
- Powerplants and factories
What are examples of pathogens that made a cross-species transfer to humans?
- Influenza virus
- Hantavirus
- West Nile Virus
