Excretory waste of Pheretima is

Options

A. Ammonia
B. Urea
C. Uric acid
D. Both (1) & (2)

Answer

To determine the excretory waste of Pheretima, we can follow these steps:

### Step 1: Understand the Organism
Pheretima is a genus of earthworms, which belong to the phylum Annelida. Earthworms are known for their segmented bodies and play a significant role in soil aeration and fertility.

**Hint:** Remember that Pheretima is an annelid, which helps in understanding its biological processes.

### Step 2: Identify Excretory Products
Excretory wastes can be classified into three main types: ammonia, urea, and uric acid. Additionally, substances like creatinine can also be excreted, but the primary focus is on the main types.

**Hint:** Recall the three primary types of nitrogenous wastes: ammonia, urea, and uric acid.

### Step 3: Determine the Excretory Mechanism
In annelids like Pheretima, the excretion primarily occurs through nephridia, which are specialized excretory structures. These structures help in filtering waste products from the blood or coelomic fluid.

**Hint:** Think about how different organisms excrete waste and the role of specialized structures like nephridia in annelids.

### Step 4: Conclude the Excretory Waste
The excretory waste of Pheretima primarily includes ammonia and urea. These substances are typically found in the blood or coelomic fluid of the organism. Therefore, the correct answer would be that the excretory waste of Pheretima consists of ammonia and urea.

**Hint:** Focus on the fact that both ammonia and urea are significant excretory products in many organisms, including Pheretima.

### Final Answer
The excretory waste of Pheretima is ammonia and urea.