The Earliest Photosynthetic Organisms

question 62

Multiple Choice

The earliest photosynthetic organisms:

• A)probably did not produce oxygen.
• B)probably used water as a source of hydrogen.
• C)probably used hydrogen sulfide as a source of hydrogen.
• D)date back to the time when life first emerged on Earth.
• E)possessed chloroplasts.

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Definitions:

Eyewitnesses

Individuals who have directly seen an event or occurrence and can provide a first-hand account or testimony of what happened.

Racial or Ethnic Group

A category of people who identify with each other based on similarities such as common ancestral, linguistic, cultural, or national experiences.

Nonthreatening

Describes an attitude, behavior, or situation that does not pose any danger or cause anxiety.

Outgroup Homogeneity Bias

The assumption that outgroup members are more similar to one another than ingroup members are to one another.