Which of the Following Relies Upon Existing Biodiversity for the Decontamination

question 39

Multiple Choice

Which of the following relies upon existing biodiversity for the decontamination of polluted ecosystems?

• A) Some types of bacteria naturally convert toxins to less hazardous forms.
• B) Sawdust from lumber mills can be used to soak up chemicals that have saturated natural ecosystems.
• C) Species in contaminated areas may evolve into forms that can survive in contaminated soils.
• D) After centuries of agricultural production, soils depleted of nitrogen can be replenished by promoting the growth of nitrogen-fixing organisms.

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Definitions:

Root Cap

A protective structure located at the tip of a plant root that shields the growing tip in the soil, secretes mucilage to aid in movement, and perceives gravity.

Phototropin

A protein that acts as a blue-light receptor, causing phototropic responses in plants towards light sources.

Phototropic Response

the growth or movement of a plant organ toward or away from light, as a response to its direction.

Phytochrome

A blue-green, proteinaceous pigment involved in a wide variety of physiological responses to light; occurs in two interconvertible forms, Pr (red-absorbing phytochrome) and Pfr (far-red-absorbing phytochrome).