Unit 10 (EOC/SMA)

What must happen for the carbon cycle to continue in this terrarium? (2.1.1)

• All organisms must continue to exchange gases.
• The snails must double their production of carbon dioxide.
• The plant must produce carbon dioxide at a faster rate.
• The decomposers must begin to produce oxygen.

In nature, which type of behavior causes animals to produce aggressive displays and sounds? (2.1.3)

• imprinting
• territoriality
• conditioning
• habituation

In some ecosystems, wolves have been eliminated due to their threats to humans. How can the reintroduction of wolves benefit the ecosystem? (2.1.3)

• It can eliminate weak animals from a prey population, thereby decreasing competition for natural resources.
• It can eliminate the most fit animals among the prey population, which will cause an increase in birthrates of the prey.
• It can cause the prey population to migrate to other areas, resulting in more fit prey.
• It can cause the prey population to better blend in with their environment.

Which graph best illustrates the growth of a population introduced into an environment with limited resources? (2.1.4)

• 
• 
• 
• 

What will most likely occur if the population of the world continues to increase at predicted rates? (2.2.1)

• There will be an increase in biodiversity as a result of improvements in technology.
• There will be more rapid depletion of natural resources.
• The human race will rapidly become extinct.
• All human diseases will be eliminated.

What will most likely be the result as humans move into new areas, forests are clear cut and housing developments are built? (2.2.1)

• Global temperatures will decrease because trees are removed.
• Many organisms will lose their homes because their habitats have been destroyed.
• Better sanitation in the area will reduce the amount of pollution.
• The rainfall in the area will increase because there will be increased runoff.

Which will most likely result in a negative growth rate in the human population of a country? (2.2.1)

• The death rate is higher than the birth rate.
• The birth rate is higher than the death rate.
• The country has improved economic conditions.
• The country has made improvements in sanitation.

What will most likely happen if a nonnative species is introduced into a stable ecosystem? (2.2.2)

• The native species will change their diet, and the ecosystem will remain stable.
• The native species will move to another area, and the ecosystem will remain stable.
• The native species will have to compete for resources with the nonnative species, and the ecosystem will become unbalanced.
• The native species will share their food with the introduced species, and the ecosystem will become unbalanced.

What activity most contributes to the depletion of the ozone layer? (2.2.2)

• burning fossil fuels
• release of CFCs
• deforestation
• overuse of fertilizers

Why are many farmers encouraged to plant different types of crops on the same land throughout the year? (2.2.2)

• It prevents insects from destroying crops.
• It provides more food to other countries.
• It allows for more genetic variation in plants.
• It helps to preserve the quality of the soil.