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Excretory organs in chaetopterus are...

Excretory organs in chaetopterus are

A

absent

B

protonephridia

C

renette glands

D

mentanephridia

Text Solution

AI Generated Solution

The correct Answer is:
### Step-by-Step Solution: 1. **Identify the Organism**: The question asks about the excretory organs in Chaetopterus. Chaetopterus is a genus of marine polychaete worms. 2. **Classify the Organism**: Chaetopterus belongs to the phylum Annelida and the class Polychaeta. Polychaetes are characterized by having numerous bristles or chaetae on their segments. 3. **Understand the Excretory System**: In Annelids, the excretory system is well-developed. The primary excretory organs in these organisms are called metanephridia. 4. **Confirm the Excretory Organ**: Metanephridia are found in each segment of the body and function to filter waste from the coelomic fluid, helping in excretion. 5. **Eliminate Incorrect Options**: The other options mentioned (such as protonephridia and renate glands) are not applicable to Chaetopterus as they belong to different phyla (Platyhelminthes and Aschelminthes, respectively). 6. **Conclude the Answer**: Therefore, the excretory organs in Chaetopterus are metanephridia. ### Final Answer: The excretory organs in Chaetopterus are metanephridia. ---
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