The Biomagnification of DDT Demonstrates That

question 47

Multiple Choice

The biomagnification of DDT demonstrates that

• A) Higher trophic level organisms can concentrate toxins in a type of "inverse biological pyramid."
• B) Birds should not depend on fish for food
• C) DDT is easily metabolized and excreted by most organisms
• D) DDT is an extremely water-soluble material
• E) Water-soluble toxins are widespread

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Definitions:

Epigenetic Marks

Chemical modifications to the DNA or histone proteins that affect gene activity without altering the DNA sequence, influencing gene expression.

Refractory Period

The period immediately following a stimulus or action during which a nerve or muscle is unresponsive to further stimulation.

Neuron

A specialized cell transmitting nerve impulses; a nerve cell, the fundamental unit of the nervous system encoding and transferring information.

Myelin Sheath

A protective covering that surrounds axons of many neurons, facilitating the faster transmission of electrical impulses along the nerve cells.