Approximately How Long Have There Been Autotrophic Producers on Earth

question 54

Multiple Choice

Approximately how long have there been autotrophic producers on Earth?

• A)1 million years
• B)2 million years
• C)1 billion years
• D)2 billion years
• E)3.7 billion years

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Definitions:

Beta Emission

A type of radioactive decay where a beta particle (an electron or positron) is emitted from an atomic nucleus.

Gamma Radiation

High-energy electromagnetic radiation emitted from atomic nuclei during radioactive decay, with no mass and no charge.

Penetrating Power

The ability of a type of radiation to pass through material, affecting the extent to which different types of radiation can penetrate materials to different depths.

Belt of Stability

A term used in nuclear physics to describe the region on a chart of nuclides where stable nuclei exist, based on their neutron to proton ratio.