Question

The sponge body plan is characterized by

• A. A mouth and digestive cavity but no muscles or nerves
• B. Muscles and nerves but no mouth or digestive cavity
• C. Muscles and mouth, but no digestive cavity or nerves
• D. No mouth, digestive cavity, muscles or nerves

Answer 1

The correct option is D No mouth, digestive cavity, muscles or nerves

Sponges are multicellular organisms. These organisms have many pores on the surface of their body. The water enters through these pores, called as ostium and then the gases and food circulate in the body of the sponges. There is no mouth and the digestive system. There are no muscles or nerve network in the body of the sponges.
Thus, the correct answer is option D.