A Swim Bladder Is a Gas-Filled Sac That Helps Fish

question 37

Multiple Choice

A swim bladder is a gas-filled sac that helps fish maintain buoyancy and evolved from the lungs of ancient fish. This evolutionary change is an example of which of the following processes?

• A) exaptation
• B) changes in Hox gene expression
• C) paedomorphosis
• D) adaptive radiation

---

Definitions:

Horror

A genre of fiction designed to evoke feelings of fear, dread, or horror in the audience.

Retro

A style, design, or fashion that draws inspiration from and evokes trends, music, modes, or attitudes of the past.

Milieu

The physical or social setting in which something occurs or develops; environment.

Plot Placement

A marketing strategy where advertisers integrate their products into the storyline of movies, TV shows, or other narratives to promote the product in a subtle, non-disruptive way.