If a Ray-Finned Fish Is to Both Hover (Remain Stationary)in

question 52

Multiple Choice

If a ray-finned fish is to both hover (remain stationary) in the water column and ventilate its gills effectively, then what other structure besides its swim bladder will it use?

• A) its heart
• B) its pectoral fins
• C) its lateral line system
• D) its caudal (tail) fin
• E) its opercula

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Definitions:

Probability

A measure of the likelihood that an event will occur, quantified between 0 (impossible) and 1 (certain).

Relative Frequency Histograms

Graphs that display the proportion or percentage of observations within each category/bin of the data.

Probability Histogram

A graphical representation that displays the probability distribution of a discrete variable.

Simple Events

Events in probability that consist of a single outcome and cannot be broken down further.