All of the Following Are True Regarding Human Skin Except:​

question 18

Multiple Choice

All of the following are true regarding human skin except:​ ​

• A)​Selection favored dark skin in human ancestry.
• B)​Lightly pigmented skin is likely a recent development in human history.
• C)​Lightly pigmented skin is more highly evolved than heavier pigmented skin.
• D)​Darker skin better suits the condition of life in the tropics.

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Definitions:

A Horizon

The top layer of soil, known as topsoil, where organic matter decays and nutrients are readily available for plants.

Casparian Strip

The Casparian strip is a barrier made of a band of cell wall material found in the roots of plants, blocking the passive flow of water and solutes into the xylem by way of cell walls.

Endodermal Cells

Cells forming the innermost layer of the three primary cell layers in early embryonic development, which develop into the lining of the gut and associated structures.

Root Cell Wall

A protective layer that surrounds the cells of a plant's root, providing support and regulating the movement of water and nutrients.