What Has Created at Least Half of the Oxygen in Earth's

question 62

Multiple Choice

What has created at least half of the oxygen in Earth's atmosphere?

• A) burning fossil fuels
• B) trees in the boreal forest
• C) phytoplankton in the ocean
• D) plants, algae, and phytoplankton in the intertidal zone

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Definitions:

Frequency Theory

Theory on how the inner ear registers the frequency of sound, stating that the perception of a sound’s frequency depends on how often the auditory nerve fires.

Basilar Membrane

A key structure in the cochlea of the inner ear which plays a critical role in the sense of hearing by vibrating in response to sound.

Auditory Nerve

The nerve that transmits auditory information from the inner ear (cochlea) to the brain.

Mechanical Energy

The sum of kinetic and potential energy in physical systems, describing the ability to do work based on movement and position.