Which of the Following Geologic Materials Would Have the Highest

question 42

Multiple Choice

Which of the following geologic materials would have the highest groundwater velocities and be least effective in removing unwanted pollutants from the water?

• A) limestone with numerous solution channels and fractures widened by dissolution
• B) sandstone; well- cemented with a few, widely spaced vertical fractures
• C) a sandy loam soil with high organic carbon content
• D) lakebeds consisting of unconsolidated very fine- grained sand and silt

---

Definitions:

Regulatory Network

A regulatory network is a system of interacting genes, transcription factors, promoters, RNA, and other molecules. It functions like a biological circuit, responding to signals with output that controls the activation of genes during development, the cell cycle, and the activation of metabolic pathways.

Crystallins

Special proteins in the lens of the eye that are responsible for its transparency and refractive properties.

Gene Recruitment

The co-option of a gene for a function different from the gene's original function, contributing to evolutionary novelty.