Which of the Following Best Describes the Role of Biological

question 90

Multiple Choice

Which of the following best describes the role of biological activity in soil development?

• A)Broadleaf trees tend to increase the alkalinity of soil,whereas needleleaf trees increase the acidity.
• B)Earthworms increase soil porosity and contribute to soil movement and organic content.
• C)Plant roots provide channels for air and water movement in soils.
• D)All organisms living in,on,and over the soil,influence soil development and characteristics: they can influence the pH,the organic matter,chemical content,and biological content of soils.

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