Pheretima resembles with Nereis in all the following features, except
a. Carnivorous feeding.
b. Nephridia to remove excretory waste.
c. Dioecious with sexual dimorphism.
d. Fertilization takes place in sea water.
e. Development is indirect.

Options

A. a, c, d & e only
B. a, b, c & d only
C. b, c, d & e only
D. a, d & e only

Answer

To solve the question regarding the similarities and differences between Pheretima (earthworm) and Nereis (ragworm), we will analyze each of the options provided:

1. **Understanding the Organisms**:
- **Pheretima** refers to earthworms, which are generally considered to be detritivores or omnivorous, feeding on decomposing organic matter.
- **Nereis** refers to ragworms, which are primarily carnivorous, preying on small organisms.

2. **Analyzing Each Option**:
- **Option a: Carnivorous feeding**:
- Pheretima (earthworms) are not carnivorous; they are omnivorous. Nereis, on the other hand, is carnivorous. Thus, this statement is not true for both organisms.
- **Option b: Nephridia to remove excretory waste**:
- Both Pheretima and Nereis possess nephridia for excretion. This feature is common to both.
- **Option c: Dioecious with sexual dimorphism**:
- Nereis is dioecious (having distinct male and female individuals) and exhibits sexual dimorphism. Pheretima, however, is hermaphroditic (having both male and female reproductive organs) and does not show sexual dimorphism. Thus, this statement is not true for both organisms.
- **Option d: Fertilization takes place in sea water**:
- Nereis fertilization occurs in seawater, while Pheretima fertilization occurs in moist soil. Therefore, this statement is not true for both organisms.
- **Option e: Development is indirect**:
- Nereis has an indirect development with larval stages, while Pheretima has direct development. Thus, this statement is also not true for both organisms.

3. **Conclusion**:
- The features that do not apply to both Pheretima and Nereis are:
- a. Carnivorous feeding (Pheretima is not carnivorous)
- c. Dioecious with sexual dimorphism (Pheretima is hermaphroditic)
- d. Fertilization takes place in sea water (Pheretima fertilizes in soil)
- e. Development is indirect (Pheretima has direct development)
- Therefore, the correct answer to the question is **a. Carnivorous feeding**.