Fishes That Have Swim Bladders Can Regulate Their Density And

question 17

Multiple Choice

Fishes that have swim bladders can regulate their density and, thus, their buoyancy. There are two types of swim bladder: physostomous and physoclistous. The ancestral version is the physostomous version, in which the swim bladder is connected to the oesophagus via a short tube (see the figure) . The fish fills this version by swimming to the surface, taking gulps of air, and directing them into the swim bladder. Air is removed from this version by "belching". The physoclistous version is more derived and has lost its connection to the oesophagus. Instead, gas enters and leaves the swim bladder via special circulatory mechanisms within the wall of the swim bladder.
-Which shark structure is closest in function to a swim bladder full of gas?

• A) its lateral line system
• B) its spiral valve
• C) its liver
• D) its gills

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Definitions:

Standard Deviation

A statistical measure of the dispersion or variability in a data set, commonly used to gauge the risk associated with a financial investment.

Defined Contribution Plan

A retirement savings plan where contributions are defined, but future benefits depend on investment performance.

Risk-free Return

The theoretical return on investment with no risk of financial loss, often represented by the yield on risk-free government bonds.

Standard Deviation

A measure of the dispersion or variability of a set of data points from their mean, used in finance to indicate the volatility of an investment.