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Use the Following Figure and Information to Answer the Question

question 25

Multiple Choice

Use the following figure and information to answer the question.

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 esophagus 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 esophagus. Instead, gas enters and leaves the swim bladder via special circulatory mechanisms within the wall of the swim bladder.
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?

Acknowledge the historical context and legislative timeline of minimum wage laws.

Describe the methodologies for measuring poverty and establishing the poverty line.

Recognize trends and statistical facts regarding poverty rates among different demographic groups.

Understand the dynamics of wealth distribution in the United States from 1989 to 2013, including changes in wealth shares for top and bottom wealth holders.

Definitions:

Confidence Interval

A range of values derived from sample statistics that is likely to contain the true value of an unknown population parameter.

Null Hypothesis

In statistics, a hypothesis that proposes no significant difference or effect; the hypothesis that a researcher tries to disprove.

Alpha Level

The threshold of significance in hypothesis testing, representing the probability of making a Type I error.

Confidence Interval

A range of values, derived from sample statistics, used to estimate the true parameter of a population with a specified level of confidence.