Which of the Following Is Considered a Variable Gas in the Earth's

question 63

Multiple Choice

Which of the following is considered a variable gas in the earth's atmosphere?

• A) water vapor
• B) nitrogen
• C) oxygen
• D) argon
• E) helium

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Definitions:

Melanocytes

Cells located in the bottom layer of the skin's epidermis and in the eye, responsible for producing melanin, the pigment that gives skin its color.

Keratinocytes

The predominant cell type in the epidermis, responsible for the production of keratin, a protein that helps protect the skin from environmental damage.

Melanosomes

Organelles within cells that synthesize, store, and transport melanin, the pigment responsible for skin, hair, and eye color.

Dermal

Pertaining to the skin, particularly its deeper layer known as the dermis which contains nerve endings, glands, and vessels.