Which Term Means "Hard Skin

question 138

Multiple Choice

Which term means "hard skin"?

• A)erythroderma
• B)xeroderma
• C)ichthyoderma
• D)scleroderma

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Definitions:

Mineable Phosphate Rocks

Rock formations that contain substantial amounts of phosphate minerals, which are mined for use as fertilizers and other chemical products.

Marine Sediments

Deposits of organic and inorganic particles that accumulate on the ocean floor.

Denitrification

The conversion of nitrate (NO3) to nitrogen gas (N2) by certain bacteria (denitrifying bacteria) in the soil; part of the nitrogen cycle.

Ammonification

The conversion of nitrogen-containing organic compounds to ammonia (NH3) by certain soil bacteria (ammonifying bacteria); part of the nitrogen cycle.