Scientists Know Relatively Little About the Roles of Most Soil

question 12

Multiple Choice

Scientists know relatively little about the roles of most soil organisms because

• A) very few soil organisms have been identified
• B) it is hard to study them in a natural environment
• C) they are too small to see, even with high-powered microscopes
• D) they do not affect soil much and are not worth studying
• E) none of these; scientists have a good understanding of most soil organisms

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Definitions:

Adipose Tissue

A type of connective tissue that is specialized in storing energy as fat, providing insulation and protection to the body.

Renal Pyramid

One of a number of pyramidal masses seen on longitudinal section of the kidney; they contain part of the loops of Henle and the collecting tubules.

Renal Papilla

The tip of the renal pyramid in the kidney that extends into the renal pelvis, through which urine flows into the ureter.

Metabolic Wastes

Substances left over from metabolic processes (like carbon dioxide, urea, and lactic acid) that need to be eliminated from the body.