Which of the Following Was Probably an Important Factor in Bringing

question 20

Multiple Choice

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

• A) the movement of animals onto land
• B) an increase in the concentration of atmospheric nitrogen
• C) the emergence of predator-prey relationships
• D) the origin of bilaterian animals

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Definitions:

Pseudostratified Ciliated Columnar

A type of epithelium characterized by cells of varying heights that appear stratified but are actually a single layer, often with cilia on the surface.

Stratified Squamous Epithelium

A type of epithelial tissue composed of multiple layers of cells with the outermost layer being flat and thin, serving as protection against mechanical stress and abrasion.

Simple Columnar

Refers to a single layer of tall, closely packed cells, lining organs such as the digestive tract, where they serve functions in absorption, secretion, or protection.