The Figure Below Shows the Relative Concentration of Polychlorinated Biphenyls

question 32

Multiple Choice

The figure below shows the relative concentration of polychlorinated biphenyls (PCBs) in several members of a lake food web.
Although the lake trout and minnow are both fish, the lake trout is more contaminated. Why?

• A) Lake trout are bigger so their bodies can store a greater quantity of PCBs.
• B) PCBs dissolve poorly in water but readily in fat; lake trout have a higher percentage of body fat than minnows.
• C) Lake trout are large and long-lived; when they respire the pass water over their gills allowing the PCBs in the lake to accumulate it their bodies.
• D) Lake trout fed on minnows while minnows fed on crustaceans.

Understand the concept of absolute value and its use in evaluating expressions.

Perform operations on algebraic expressions involving exponents and radicals.

Understand the process and significance of check clearing including transit and processing float.

Grasp the factors influencing a firm's level of receivables and the impact of credit policy on these levels.

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Definitions:

Upper Respiratory

Pertains to the parts of the respiratory system located above the diaphragm, including the nose, nasal passages, throat, and larynx.

Membrane Excitability

Membrane excitability refers to the ability of nerve and muscle cells to produce a rapid change in their membrane potential, crucial for the generation and propagation of electrical signals.

Electric Charges

Electric charges are the physical properties of particles that cause them to attract or repel each other, based on the principle that like charges repel and opposite charges attract.

Nerves

Bundles of fibers that transmit electrical impulses between the brain, spinal cord, and other parts of the body, facilitating communication and responses.