What is ecological balance?

What is ecological balance?

A - The condition of equilibrium between native and non-native species in an environment
B - The condition of equilibrium among members of the same species in an ecosystem
C - None of these
D - The condition of equilibrium among the different species in an ecosystem


Answer: D - The condition of equilibrium among the different species in an ecosystem

Which of the following processes provides balance within the native habitat of a species, but is no longer present once the species is introduced into a new habitat?

Which of the following processes provides balance within the native habitat of a species, but is no longer present once the species is introduced into a new habitat?

A - Evolution
B - Coevolution
C - Competition
D - Niche differentiation
E - Migration


Answer: B - Coevolution

A chaparral plant that is usually only seen in the first couple of years after a fire is also called what?

A chaparral plant that is usually only seen in the first couple of years after a fire is also called what?

A - A fire-follower
B - A fire germinator
C - A smoke germinator
D - Hibernating vegetation
E - Ash vegetation


Answer: A - A fire-follower

What is a climax community?

What is a climax community?

A - The first community of organisms to colonize a habitat in the ecological succession process.
B - The community that was present before an ecological disturbance occurred.
C - The ecological community with the highest species diversity that can occupy a given habitat.
D - The ecological community with the highest biomass that can occupy a given habitat.
E - The community that can be stably maintained after ecological succession is completed.


Answer: E - The community that can be stably maintained after ecological succession is completed.

Which of the following is a TRUE statement about introduced species?

Which of the following is a TRUE statement about introduced species?

A - Introduced species that become established in their new environment are able to do so because they are able to evolve quicker than introduced species that do not become established
B - To be successful, introduced species must find a way to survive all of the same environmental and community factors that native species have to survive.
C - Introduced species are usually better equipped to survive in an ecosystem than the native species are.
D - Ecologists can easily predict the effects of introducing a new species to an ecosystem.
E - If an introduced species becomes established it will always become invasive.


Answer: B - To be successful, introduced species must find a way to survive all of the same environmental and community factors that native species have to survive.

What is an invasive species?

What is an invasive species?

A - A species that is continuously expanding its range
B - A non-native species whose introduction into an area has caused economic or ecological harm
C - A species that is living outside of its native environment and was brought there by human activity
D - A species that is naturally found in an area and was not introduced by humans
E - Any introduced species that survives and thrives in its new environment

Answer: B - A non-native species whose introduction into an area has caused economic or ecological harm