The Organisms Originally Responsible for Putting Oxygen in Earth's Atmosphere

question 74

Multiple Choice

The organisms originally responsible for putting oxygen in Earth's atmosphere lived around:

• A)1)5 million years ago.
• B)2)3 billion years ago.
• C)3)5 million years ago.
• D)3)5 billion years ago.
• E)6 billion years ago.

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Definitions:

Adjustable Pliers

Tools with a multipositional slip joint that permits a wide spread of jaw dimensions.

Teeth Per Inch

A measurement that indicates the number of teeth in a one-inch length of a saw blade or other cutting tool, determining its cutting capability and finish.

Hacksaw Blade

A thin, toothed strip of metal used in a hacksaw for cutting materials like metal and plastic.

Copper Tubing

Copper tubing is a type of piping made from copper, widely used in plumbing, HVAC, and refrigeration systems for its durability and thermal conductivity.