Midterm review quiz

Farmers in California have switched from growing a variety of fruit trees to growing a single type of fruit tree. This is concerning because this practice

• Reduces biodiversity of their fields

• Increases the number of decomposers in their fields

• Decreases the need to import food

• Increases the number of invasive species

Which of the following human activities increases the amount of carbon dioxide in the atmosphere?

• Not using products containing plastics

• Driving cars long distances

• Using alternative energy sources

• Biking

Increased concern over the number of heat related illnesses among cross country runners has led to a possible change in uniform design. Tank tops were designed to help keep the body cool. Tests showed that the use of this uniform during races resulted in a reduction of body temperature and heart rate. This new tank top would help the runner:

• Control the rate of muscle activity

• Increase muscle strength

• Maintain homeostasis

• Eliminate the release of heat from the body

Why are there fewer organisms at each feeding level going up an ecological pyramid?

• Some energy is lost to the environment as heat

• Larger organisms require less energy

• Energy is recycled at each level and remains there

• Decomposers convert energy into inorganic compounds

What is the primary source of energy in a food web?

• Cellular respiration

• Minerals in the soil

• Fossil fuels

• The sun

Which of the following ecosystems is the most stable?

• An ecosystem with 4 species

• An ecosystem with 8 species

• An ecosystem with 20 species

• An ecosystem with 200 species

Which of the following describes why fungi are important?

• They synthesize compounds used by producers

• They break down materials for other organisms to use

• The limit the number of plants in an area

• They compete with herbivores

__________ provides energy for living organisms

• Carbon dioxide

• Water

• The sun

• Oxygen

Which of the following is the most direct example of human activity negatively harming the ecosystem

• Plastic garbage breaking down in the ocean

• A volcano erupting and forming an island

• A climax community forming after a natural disaster

• Deer reaching their carrying capacity and depleting resources in the environment

We burn fossil fuels daily to warm our homes and drive our cars. From 1990 to present, the amount of CO2 released into the atmosphere has increased. Even if we cut the amount of CO2 released into the atmosphere to half the level released in 1990, the projected amount of CO2 in the atmosphere in 2090 will be higher than in 1990. Which statement is best supported by the passage above

• Future generations can expect higher levels of CO2

• Climate change will result in the melting of polar ice caps

• Increase in CO2 will cause increase in average global temperature

• Human activities have no effect on atmospheric carbon dioxide levels