Use the Accompanying Figure to Answer the Following Question

question 32

Multiple Choice

Use the accompanying figure to answer the following question.
-The O horizon is _____________

• A)composed primarily of bedrock
• B)primarily composed of organic materials
• C)composed of equal amounts of bedrock and organic material
• D)primarily loam
• E)usually more sand than silt or clay

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Definitions:

Day

The period of 24 hours from one midnight to the next, or the part of this period when it is light and which is distinguished from night.

SRY Gene

A gene on the Y chromosome responsible for initiating male sex determination in humans and most other mammals.

Master Gene

Gene encoding a product that affects the expression of many other genes.

Lactose

A disaccharide sugar composed of glucose and galactose, commonly found in milk and dairy products.