Structures in an Organism That Have No Current Function Are

question 81

Multiple Choice

Structures in an organism that have no current function are referred to as ____.

• A) homologous
• B) vestigial
• C) mutualistic
• D) fossils
• E) convergent

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Definitions:

Pseudostratified Ciliated Columnar Epithelium

A type of epithelium where cells of differing heights appear to be in layers (stratified) but are not, with cilia on the surface, commonly found lining the respiratory tract.

Simple Cuboidal Epithelium

A type of epithelium that consists of a single layer of cells that are roughly square-shaped in section and are involved in secretion, absorption, and filtration.

Stratified Squamous Epithelium

A type of epithelial tissue composed of several layers of flat cells, designed to protect underlying tissues.

Gap Junction

Small channel between cells that allows the passage of ions and small molecules between cells; provides means of intercellular communication.