Raccoons prefer woody areas and are omnivores, which means that they eat meat and plant materials. They are nocturnal, meaning that they are active at night. They are often eaten by mountain lions, gray wolves, and coyotes. Which of the following is a limiting factor for a raccoon population?

Question

shortened summer days
deforestation
claw length
breeding season

2. The construction of wind farms has affected the migratory patterns of some bird populations. Bird populations have been noted to no longer increase and sometimes even decrease in these areas. What is this known as?
a density-dependent limiting factor
a population-independent factor
a density-independent limiting factor
a population-dependent limiting factor

3. Which two factors can both cause a population to increase?
birth rate and emigration
birth rate and immigration
death rate and immigration
death rate and emigration

4. What will most likely increase if there is a high death rate?
immigration
emigration
birth rate
population

5. Poison dart frogs live in the rainforest. They produce a poison by eating toxic fire ants. The only known predator is a snake, Liophis epinephelus.
Which is most likely a density-independent factor that affects the poison dart population in the rainforest?
clear cutting the rainforest
limited food source
susceptibility to disease
increase in population of Liophis epinephelus

6. A population of elephants becomes too large, and several members leave the population. What is this process called?
death rate
immigration
emigration
births

7. Colorado has a vast population of lodgepole pines. A population of lodgepole pines has been killed in a section of the forest. What is a possible limiting factor of that population?
devastation by the pine bark beetle
Colorado’s long history of acidic soils
genetic variability
shallow root system

8. Which human activity can produce disruption of fish breeding habits, increase in mosquito population, and flood control?
construction of dams to produce electricity
habitat destruction that decreases beaver population
increased erosion due to improper farming techniques
overfishing in artificial lakes

9. A square kilometer of forest has 200 deer. What is the term that is used to describe this number?
density-dependent
birth rate
limiting factors
population density

10. Typhoid fever is caused by bacteria in contaminated food or drink. In 1903, an outbreak of typhoid fever in Ithaca, New York, killed almost 80 people. In addition, more than 1,000 Ithaca residents became sick with the disease. The population shares the public water source. Which type of limiting factor was involved in the typhoid outbreak that occurred in Ithaca?
density-independent factor
density-dependent factor
population-dependent factor
population-independent factor

Answer 1

Here are the answers to your questions:

1. Which of the following is a limiting factor for a raccoon population?

   • Answer: deforestation

2. What is this known as?

   • Answer: a density-independent limiting factor

3. Which two factors can both cause a population to increase?

   • Answer: birth rate and immigration

4. What will most likely increase if there is a high death rate?

   • Answer: emigration

5. Which is most likely a density-independent factor that affects the poison dart population in the rainforest?

   • Answer: clear cutting the rainforest

6. What is this process called?

   • Answer: emigration

7. What is a possible limiting factor of that population?

   • Answer: devastation by the pine bark beetle

8. Which human activity can produce disruption of fish breeding habits, increase in mosquito population, and flood control?

   • Answer: construction of dams to produce electricity

9. What is the term that is used to describe this number?

   • Answer: population density

10. Which type of limiting factor was involved in the typhoid outbreak that occurred in Ithaca?

    • Answer: density-dependent factor

Feel free to ask if you have more questions!