Question

Assertion : Digestion is chiefly extracellular in Ctenophores.
Reason : In Ctenophores, digestive tract is incomplete.

• A. If both assertion and reason are true and reason is the correct explanation of assertion
• B. If both assertion and reason are true but reason is not the correct explanation of assertion
• C. If assertion is true but reason is false
• D. If both assertion and reason are false

Answer 1

Answer: (D)

Digestive tract in Ctenophores consists of mouth, pharynx or stomodaeum, stomach or infundibulum, anal canals and two anal pores. Since there are mouth and anal pores present, the digestive tract is complete. The digestion in Ctenophores is both extracellular and intracellular.