Question

Match the structures with their functions in Cnidaria:

List I	List II
A. Cnidoblast --- I. Used for anchorage, defence and for the capture of prey B. Polyps --- IV. Produce Medusae asexually C. Medusae --- II. Used to form the polyps sexually D. Hypostome --- III. Single opening for gastrovascular cavity	I. Used for anchorage, defence and for the capture of prey IV. Produce Medusae asexually II. Used to form the polyps sexually III. Single opening for gastrovascular cavity

• A. A-I, B-IV, C-II, D-III
• B. A-II, B-III, C-I, D-IV
• C. A-IV, B-II, C-III, D-I
• D. A-III, B-I, C-IV, D-II

Hint:

Cnidoblasts sting; Polyps bud asexually to form medusae; Medusae reproduce sexually forming polyps; Hypostome bears the mouth.

Answer 1

The Correct Option is A

Step 1: Concept
Functions of structures in Cnidaria.

Step 2: Meaning
Cnidarians show alternation of generations between polyp and medusa forms.

Step 3: Analysis
Cnidoblast (A): Stinging cells used for anchorage, defence, and prey capture --- matches I.
Polyps (B): Reproduce asexually by budding to produce medusae --- matches IV.
Medusae (C): Reproduce sexually; their gametes fuse to form planulae that develop into polyps --- matches II.
Hypostome (D): The cone-shaped projection bearing the mouth, which is the single opening to the gastrovascular cavity --- matches III.

Step 4: Conclusion
Correct matching: A-I, B-IV, C-II, D-III. Final Answer: (A)