Soil Orders Are Grouped By

question 38

Multiple Choice

Soil orders are grouped by:

• A)their fertility
• B)their color
• C)level of horizon development and humus content
• D)thickness of the A horizon and latitude

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Definitions:

Lacunae

Small spaces, cavities, or depressions; in biology, they are often associated with cartilage and bone, housing cells.

Periosteum

A hefty layer of connective tissue, rich in blood vessels, surrounds the bones, with the exception of the joint regions.

Trabeculae

Trabeculae are the small, beam-like structures of spongy bone that provide structural support and help reduce the weight of bones.

Central Canal

A fluid-filled channel in the center of the spinal cord.