Ecology 3 Lesson Pd. 1

Open Ended

How do limiting factors influence competition among species in an ecosystem?

Multiple Choice

Which of the following is considered a limiting factor that can affect the population growth of a species?

• Amount of food

• Number of species

• Genetic diversity

• Sunlight intensity

Multiple Choice

What happens when a population exceeds the carrying capacity of its environment?

• Organisms will die and the population will decrease

• The population will continue to grow indefinitely

• Resources will increase to support the population

• The environment will expand

Open Ended

How does the concept of carrying capacity help explain the fluctuations seen in the population graph of a natural ecosystem?

Multiple Choice

Which of the following best describes a symbiotic relationship?

• A relationship of dependence or mutual benefit between organisms

• A relationship where only one organism benefits and the other is harmed

• A relationship where organisms compete for resources

• A relationship where organisms avoid each other

Multiple Select

Which of the following are examples of mutualism?

• Termites and cellulose-digesting microorganisms

• Clownfish and sea anemone

• Tapeworm and humans

• Ibis and Crocodile

Multiple Choice

In which type of symbiotic relationship does one organism benefit while the other is not affected?

• Commensalism

• Mutualism

• Parasitism

• Competition

Multiple Choice

Which of the following best describes ecological succession?

• The process by which an existing community is slowly replaced by another community

• The process by which animals migrate from one place to another

• The process by which plants grow faster in summer

• The process by which rocks are broken down by weather

Open Ended

Explain the difference between dominant species and pioneer species in an ecosystem.

Multiple Select

Which of the following are true about secondary succession?

• It occurs after a disturbance in an existing community

• It always starts with lichens on bare rock

• It can follow events like forest fires

• The soil remains after the disturbance

Open Ended

How do limiting factors influence competition within an ecosystem?

Multiple Choice

Which of the following is NOT considered a limiting factor for the population growth of a species?

• Amount of food

• Availability of water

• Access to shelter

• Genetic mutation