Question

Nutrition in sponges is

• A. Extracellular
• B. Intracellular
• C. First extracellular and the intracellular
• D. First intracellular and then extracellular

Answer 1

The correct option is B Intracellular

• In extracellular digestion, digestion occurs outside the cells. The food is broken down into simpler substances in digestive system and the nutrients are absorbed by the cells.
• In intracellular digestion, digestion occurs inside the cells.
• Sponges do not have a digestive system. The food is directly ingested by them with the help of choanocytes which is then transferred to food vacuoles and broken down into simpler substances.

Hence, nutrition in sponges is intracellular as it is occurring inside the cells.

So, the correct answer is 'Intracellular'.