Unit 2 Ecology Review

The parts of an ecosystem that are currently living or that have once lived.

• Biotic Factor
• Abiotic Factor
• Species
• Biome

Which type of succession occurs in an area previously occupied by living things that are disturbed and then recolonized?

• Quaternary succession
• Primary succession
• Secondary succession
• Tertiary succession

What are the non-living features of the environment called?

• Biotic factors
• Living factors
• Organic factors
• Abiotic factors

What are the first organisms to live in an area during ecological succession called?

• Indicator species
• Keystone species
• Pioneer species
• Invasive species

Which type of succession occurs when newly exposed or newly formed rock is colonized by living things for the first time?

• Quaternary succession
• Primary succession
• Tertiary succession
• Secondary succession

How much energy is available to be passed on to the next trophic level in an ecosystem?

• 100%
• 10%
• 50%
• 75%

The rabbit in this food web would be considered a:

• Decomposer
• Producer
• Secondary Consumer
• Primary Consumer

Which of the following best describes an ecosystem?

• all the living organisms in an area and their physical surroundings
• a region with a distinct climate
• all the living organisms of the same species throughout the world
• all the living organisms in an area

What is the ultimate source of energy for all ecosystems?

• the Sun
• plants
• secondary consumers
• primary consumers

78% of Earth's atmosphere is nitrogen gas. All living things need nitrogen as a part of DNA and RNA. Yet you and I, and other living things, cannot use the nitrogen in our atmosphere directly. One type of organism is responsible for "fixing" nitrogen or helping to put it in a form so other living things can use it. That organism is

• bacteria.
• fungi.
• plants.
• viruses.