sexually mature Nereis is called

Options

A. Homonereis
B. heteronereis
C. atoke
D. thelytoke

Answer

To answer the question "What is a sexually mature Nereis called?", we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Organism**: Nereis is a genus of marine polychaete worms that belong to the phylum Annelida.

2. **Understand Sexual Maturity**: Sexual maturity in Nereis refers to the stage when the organism has developed fully and is capable of reproduction.

3. **Recognize the Reproductive System**: Nereis exhibits a unique reproductive system where both male and female reproductive organs are present in the same individual. This characteristic is significant in understanding its sexual maturity.

4. **Define the Term**: The term used to describe a sexually mature Nereis is "Heteronereis". This term indicates that the organism has both male and female reproductive organs.

5. **Eliminate Incorrect Options**:
- "Homo Nereis" does not exist as it would imply the presence of only one type of sex organ.
- "Adhoc" refers to a stage before sexual maturity, not the mature form.
- "Teletalkie" relates to a different reproductive process (parthenogenesis) and is not the correct term for mature Nereis.

6. **Conclusion**: Therefore, the correct term for a sexually mature Nereis is "Heteronereis".

### Final Answer:
Sexually mature Nereis is called **Heteronereis**.

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