Ecology Test Review!!

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

• 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 birth rates 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?

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

• 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 result as humans move into new areas, forests are cut, and housing developments are built?

• Global temps 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 pollution

• The rainfall in the area will increase because of increased runoff

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

• Death rate is higher than the birth rate

• Birth rate is higher than death rate

• Improved economic conditions

• Improved sanitation

Which of these contributes to the depletion of the ozone layer

• Burning fossil fuels

• Release of CFC's

• Deforestation

• Overuse of fertilizers

True or False: Farmers are encouraged to plant different crops on the same land throughout the year because it helps to preserve the soil quality

• True

• False

What are plants called in a food chain?

• Producers /Autotrophs

• Consumers /Heterotrophs

• Decomposers

• Scavengers

What happens to the amount of available energy in the pyramid as it moves up through the different levels?

• it increases

• it decreases

• it remains the same

Which organism recieves the least amount of energy from the producer?

• Owl
• Grasshopper
• Lilypad
• Mouse