Scientists Estimate That for More Than _______ Years After Cells

question 23

Multiple Choice

Scientists estimate that for more than _______ years after cells originated,all organisms consisted of one cell.

• A) 250,000
• B) 2 million
• C) 200 million
• D) 2 billion
• E) 20 billion

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Definitions:

Cyanotic

Describing a blue or purple coloration of the skin, indicating a lack of oxygen in the bloodstream.

Physiological

Pertaining to the normal functioning of living organisms and their parts, including all physical and chemical processes.

Open System

A system that interacts with its environment through the exchange of energy, matter, or information, in contrast to a closed system, which is isolated from its surroundings.

Coping With Stressors

Strategies or mechanisms used by individuals to manage and adapt to stressful situations or environments.