Which of the Following Was Probably the Least Important Factor

question 56

Multiple Choice

Which of the following was probably the least important factor in bringing about the Cambrian explosion?

• A) the emergence of predator-prey relationships among animals
• B) the accumulation of diverse adaptations, such as shells and different modes of locomotion
• C) the origin of Hox genes and other genetic changes affecting the regulation of developmental genes
• D) the movement of animals onto land
• E) the accumulation of sufficient atmospheric oxygen to support the more active metabolism of mobile animals

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Definitions:

Open Systems

A system is open or closed to the degree that it can exchange information and energy with its environment. A more open system can adapt to environmental changes.

Closed Systems

A system is open or closed to the degree that it can exchange information and energy with its environment. A closed system cannot adapt to environmental changes and is more likely to move toward entropy.

Levels

Different stages or degrees in a hierarchy or process.

Dynamic Function

The ability or process within a system or entity to change or evolve over time in response to external and internal conditions.