Ecology Review #1

Biodiversity, aka biological diversity, usually refers to

• the same species in a general location

• the number of different species in a given area

• the number of animal species in a given area

• the number of plant species in a given area

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A population is

• a group of similar species in different areas

• a group of the same species in the same geographic area.

• a group of several species in the same geographic area

• a group of several species along with their abiotic factors in a small area.

High biodiversity is 

• having a lot of the same organism.
• having a few of the same organism.
• having a lot of variety of different organisms.
• only having one of each organism. 

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What is the original source of almost all energy in most ecosystems?

• carbohydrates
• sunlight
• water
• carbon

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Autotrophs make up the _______ trophic level in all ecosystems.

• First
• Second
• Third
• Fourth

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What does a food web represent?

• All connections of energy flow throughout all organisms in a habitat.
• The specific ways that mutualism is carried out.
• A single pathway or energy flow between organisms. 
• How carnivores get their food. 

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The amount of energy that usually transfers from one trophic level to the next...

• 10%
• 20%
• 80%
• 50%

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The living portions of the ecosystem.

• Biotic factors
• Abiotic factors

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Water temperature would be an example of ...

• A biotic factor
• An abiotic factor

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A collection of organisms that belong to different populations but all live in the same area and interact with one another.

• Population
• Ecosystem
• Community
• Ecosphere

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