[Campbell Biology P.750] Which statement accurately describes the function of structures in ... | Practice Question

Which statement accurately describes the function of structures in a clam, as illustrated and described in the text?

  • A: The incurrent siphon is primarily for expelling waste products.
  • B: Gills in clams are used for both gas exchange and collecting food particles.
  • C: The foot of a clam is primarily used for jet propulsion.
  • D: The mantle cavity in clams functions as a lung for air breathing.

Explanation

The text states that 'The gills of bivalves are used for feeding as well as gas exchange in most species' and Figure 33.19's caption notes that 'Food particles suspended in water that enters through the incurrent siphon are collected by the gills'. This confirms that gills serve both functions.