[Campbell Biology P.736] According to the provided text, which of the following is a charact... | Practice Question

According to the provided text, which of the following is a characteristic feature of animals belonging to the phylum Porifera?

  • A: They possess a gastrovascular cavity with a single opening serving as both mouth and anus.
  • B: They are sessile animals that lack true tissues and are filter feeders.
  • C: They have bilateral symmetry and a central nervous system.
  • D: They are diploblastic and radially symmetrical, using eight 'combs' of cilia for propulsion.

Explanation

The text states that Porifera sponges are 'sessile animals that lack tissues' and 'live as filter feeders, trapping particles that pass through the internal channels of their body'. Option B accurately reflects these characteristics.