Which Would Be the Most Prone to Surface Contamination from Runoff

question 17

Multiple Choice

Which would be the most prone to surface contamination from runoff and infiltration?

• A) wells a few hundred metres uphill from septic systems in rugged mountainous terrain
• B) deep confined aquifers directly below contaminated sites
• C) shallow aquifers with thin soils or unconsolidated coarse overburden
• D) an aquifer with a thick, overlying, unsaturated vadose zone

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Definitions:

Disruptive Selection

Mode of natural selection in which forms of a trait at both ends of a range of variation are adaptive, and intermediate forms are selected against.

Hybrid Sterility

A condition in hybrids between different species where the offspring are sterile, unable to produce viable gametes.

Viable Gametes

Sex cells (sperm and eggs) that are capable of fertilization and development into a new organism.

Reproductive Maturity

The stage in an organism's life cycle when it becomes capable of producing offspring.