How do sponges obtain their food?

• A. By capturing prey with tentacles
• B. By absorbing nutrients through their skin
• C. By photosynthesis
• D. By filtering water through their pores

Answer: (D)

Verified step by step guidance

1. Understand the basic biology of sponges: Sponges are simple multicellular organisms that belong to the phylum Porifera. They are primarily aquatic and are known for their porous bodies.
2. Learn about the structure of sponges: Sponges have a unique body structure with numerous pores called ostia. These pores allow water to flow into the sponge's body.
3. Explore the feeding mechanism: Sponges feed by filtering water through their pores. As water passes through the sponge, tiny food particles such as bacteria and plankton are trapped and consumed.
4. Identify the role of choanocytes: Inside the sponge, specialized cells called choanocytes have flagella that create a current, drawing water through the sponge and trapping food particles.
5. Recognize the importance of the water flow system: The continuous flow of water through the sponge's body is essential for feeding, respiration, and waste removal, making it a key aspect of sponge biology.