Question

Which of the following do fish NOT use to breathe? A. air bladder B. pharyngeal slits C. pores on their back D. olfactory bulbs

Answer 1

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Answer 2

Which do you think it is? Why or why not? It would be easier to tutor you if you explained what about the question is giving you trouble.

Answer 3

http://www.britannica.com/EBchecked/topic/577044/swim-bladder

Answer 4

@jimbob46 Do you know what all the options are?