According to Current Science, Why Didn't Oxygen Begin to Accumulate

question 24

Multiple Choice

According to current science, why didn't oxygen begin to accumulate in the atmosphere for more than a billion years after life appeared on the Earth?

• A)Oxygen was removed from the atmosphere by dissolving in the ocean as quickly as it was released by life.
• B)Early life did not release oxygen, and oxygen releasing organisms didn't evolve for a billion years after the earliest life.
• C)Oxygen was removed from the atmosphere by chemical reactions with surface rocks as quickly as it was released by life.
• D)Early forms of animal life consumed the oxygen released by plants during the first billion years of life on Earth.

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Definitions:

Motivation

The internal and external factors that stimulate desire and energy in people to be continually interested and committed to a job, role, or subject, or to make an effort to attain a goal.

Autobiographical Memory

The aspect of memory that involves the recollection of specific events, situations, and experiences from one's own life.

Metacognition

The self-recognition and comprehension of one's cognitive activities, commonly described as "contemplating one's own thoughts."

Working Memory

A cognitive system with a limited capacity that is responsible for temporarily holding information available for processing.