Question

How do poriferan animal differ from coelenterate animals?

• A. They have gastrovascular cavity.
• B. They have nematocyst.
• C. They have incomplete digestive system.
• D. Both A and B

Answer 1

The correct option is D Both A and B

• Poriferans do not have a gastrovascular system because they have a simple cellular level of organization where individual cells do not form tissues. While in coelenterates tissue-level organization is found so they can form a gastrovascular cavity.
• The nematocyst is a specialized cell in the tentacles of coelenterates that helps in defence. While there is no specialized cell found in Porifera.
• Poriferans and coelenterates both show incomplete digestive systems.
  

So, the correct answer is 'Both A and B'.