Front

True or False: A keystone species is an organism that helps define an entire ecosystem. Without its keystone species, the ecosystem would be dramatically different or cease to exist altogether.

Back

True

Front

True or False: Limiting factors within an ecosystem determine the carrying capacity of that ecosystem.

Back

True

Front

True or False: Immigration and increased birth rate would cause a decrease in a population's size.

Back

False

Front

True or False: The number of individuals that an environment can support is the population density of that environment

Back

False

Front

In a logistic growth model, how does population size change over time?

Back

Over time, population size increases and then levels off to a maximum value.

Front

As limiting factors, how do diseases differ from forest fires?

Back

Diseases have a greater effect on a dense population than one that is less dense.

Front

Which of the following would NOT increase a population's size?

• More births than deaths
• More deaths and births
• Immigration
• They all will increase population size.

Back

More deaths and births

Front

In a given population, the birth rate is equal to the death rate. What is true about this population?

Back

The population is remaining constant in size.

Front

What happens if a population exceeds the carrying capacity of the environment?

Back

The death rate would increase.

Front

Which letter represents the carrying capacity of this environment? Options: A, B, C, Not labeled

Back

B