The Oxygen Produced by Photosynthesis Is Considered an Ecosystem Service

question 70

Multiple Choice

The oxygen produced by photosynthesis is considered an ecosystem service because

• A) it is a beneficial, but not required, service provided by nature.
• B) it can only be produced by photosynthesis.
• C) environmentalists consider it important.
• D) it benefits humans and would be difficult or costly to replace.
• E) it cannot be altered and will always be available from nature.

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Definitions:

Eustachian Tube

A small canal that connects the middle ear to the throat, helping to equalize air pressure on both sides of the eardrum and drain fluid from the middle ear.

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Inflammations or infections of the ear, which can affect the outer, middle, or inner parts, often causing pain, fluid buildup, and sometimes hearing loss.

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The abilities required to control the small and large muscles of the body for movements such as walking, jumping, and holding.

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The trend of people living longer lives, often due to improvements in healthcare, nutrition, and living conditions.