[Campbell Biology P.739] If a sponge's choanocytes were unable to beat their flagella effect... | Practice Question

If a sponge's choanocytes were unable to beat their flagella effectively and its amoebocytes were impaired in their ability to produce skeletal fibers, what would be the most significant consequence for the sponge?

  • A: The sponge would transition from a sessile to a free-swimming lifestyle to find food.
  • B: It would develop a new specialized organ for gas exchange and waste removal.
  • C: Water flow through the sponge would be severely compromised, leading to impaired feeding and potential structural collapse.
  • D: The sponge would develop true tissues and organs to adapt to its new environment.

Explanation

Choanocytes use their flagella to create water currents, which are essential for feeding. Impaired flagella would severely reduce water flow, directly impacting their ability to filter food. Amoebocytes produce skeletal fibers spicules/spongin which provide structural support. Without these, the sponge's body would lose its integrity and potentially collapse. Both dysfunctions combine to have a significant negative impact on survival.