Contrast reproduction in sharks with that of most other fishes.

Which of the following is not a key characteristic of fishes? a. vertebral column b. gills c. single-loop circulation d. tympanic membrane

Summarize how the swim bladder can be viewed as an energy-saving mechanism.

Research the field of ichthyology (the study of Fishes). and find out what types of career options are available to an ichthyologist. Your report should include job descriptions, training required. kinds of employers. growth prospects, and starting salaries.

Read "Secrets of the Slime Hag." by Frederie H. Martini (Scientific American, Oct. 1998, vol. 279, D? 70-75). What unusual method do slime hags use to repel attacks? Why is it risky to let the harvest of slime haga go unregulated?

Scientists are investigating an unexplained aspect of shark biology: sharks rarely get cancer. Use the media center or Internet rescurves to research this phenomenon. Write a report that includes information on the use of shark-cartilage dietary supplements.

Make a model of the gill of a bony fish that shows how water passes over it. Then write a description of why countercurrent flow increases respiratory efficiency.

A student is writing a paper on the evalution of the heart and has prepared the following list of vecabulary words: sinus venosus, pulmomary veins, sepram, osmork balance, astiem, opercukim, cantes arseriosas, caransous respirarion. Review the list and identify any terms that do not relate to the topic, explaining why the terms are not needed.

A newspaper article reports that some carp in a local pond are approximately 50 years old. While many readers think this is impossible, a representative from the State Department of Fish and Wildlife states that the claim can be verified. Can this claim be verified? If so, how?

Compare the efficiency of the two circulatory pathways.

Describe the sequence of blood flow through each circulatory pathway, beginning and ending with the heart.

Describe how countercurrent flow aids a fish in obtaining oxygen.

Contrast the single-loop circulation of fish with the double-loop circulation of amphibians.

Summarize the role of the operculum in fish respiration.