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Questions and Answers
Which of the following is a unique feature of Chondrichthyes' stomach?
Which of the following is a unique feature of Chondrichthyes' stomach?
- It has a J-shaped orientation (correct)
- It is capable of digesting bones
- It is located in the center of the body
- It is highly acidic
What is the purpose of spiracles in cartilaginous fish?
What is the purpose of spiracles in cartilaginous fish?
- To help them see in murky water
- To allow them to breathe while stationary (correct)
- To aid in digestion
- To regulate their body temperature
How do Chondrichthyes maintain osmotic concentration in their blood?
How do Chondrichthyes maintain osmotic concentration in their blood?
- By excreting excess salt through their gills
- By drinking large amounts of seawater
- By having a specialized organ for osmoregulation
- By retaining nitrogen-containing compounds in their blood (correct)
