Question Detail
Question
Consider the following statements: Pheretima posthuma is characterized by 1. true coelomic body cavity lined by coelomic epithelium. 2. closed circulatory system. 3. lateral hearts with valves. Which of the statements given above are correct?
Correct Answer
Option D is the correct answer.
Detailed Explanation
All three statements are correct for Pheretima posthuma (the Indian earthworm). It possesses a true coelom (schizocoel) lined by coelomic epithelium (peritoneum). It has a closed circulatory system with blood vessels. It also has lateral hearts (typically 4 pairs in segments 7-11) that are contractile and have valves to ensure unidirectional blood flow.
Hint
Consider the key anatomical features of earthworms as representative annelids.