The Oldest Evidence of Life on Earth Dates Back to About

question 55

Multiple Choice

The oldest evidence of life on Earth dates back to about how many years ago?

• A) 65 million
• B) 3.8 million
• C) 3500 million
• D) 570 million

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Definitions:

Noncyclic Electron Transport

A pathway in photosynthesis where electrons flow linearly from water to NADP+, producing oxygen and NADPH.

Photosynthesis

A process used by plants and other organisms to convert light energy into chemical energy that can later be released to fuel the organisms' activities.

Photosynthesis

The process by which green plants, algae, and certain bacteria transform light energy into chemical energy, producing oxygen and glucose from carbon dioxide and water.

Light-Dependent Reactions

The phase of photosynthesis where sunlight is absorbed by chlorophyll, resulting in the production of ATP and NADPH, which are then used in the Calvin cycle.