What does the presence of teeth, a vestigial structure in whale sharks, tell you about the whale shark's ancestor?

The whale shark forages for food at or near the surface of the ocean. Its large mouth is well adapted to filter feeding and contains more than 300 rows of small, pointed teeth in each jaw. Ichthyologists consider these teeth to be vestigial structures, and they do not play a role in feeding.

Explanation:

  plan: i will begin with a quotation about the importance of unity in a community. then, i will state my claim that an activity will unite our school by creating a shared vision, purpose, and direction. in the body, i will use three main points that describe the different avenues the students can take: through a variety of clubs, through a special event, or through an awareness week. i will provide evidence about other towns that have unity activities and the kinds of events that they include. pictures will illustrate my three main points in action. for the ending, i will restate the main idea in a new way and pose a question to keep the audience thinking. 

answer: #1 is (a) however

explanation: