Hydra possesses

Options

A. One testis and one ovary
B. One testis and many ovaries
C. Many testes and many ovaries
D. Many testes and one ovary

Answer

To solve the question regarding what Hydra possesses, we can break down the information step by step.

### Step-by-Step Solution:

1. **Understanding Hydra's Reproductive System**:
- Hydra is known to be a hermaphrodite, meaning it has both male and female reproductive organs within the same individual.

2. **Identifying Male and Female Structures**:
- In Hydra, the male reproductive organs are represented by multiple testes, which produce sperm through a process called spermatogenesis.
- The female reproductive organ is represented by a single ovary, which contains one centrally located oocyte.

3. **Characteristics of the Oocyte**:
- The oocyte in Hydra is larger and amoeboid in shape, containing a large nucleus and yolk material, which is essential for the development of the embryo after fertilization.

4. **Counting the Reproductive Organs**:
- Since Hydra has many testes (male organs) and only one ovary (female organ), we can summarize this as:
- Many testes (sperm-producing organs)
- One ovary (egg-producing organ)

5. **Evaluating the Options**:
- Based on the reproductive structures identified:
- **One testis, one ovary**: Incorrect.
- **One testis, many ovaries**: Incorrect.
- **Many testes, many ovaries**: Incorrect.
- **Many testes, one ovary**: Correct.

### Final Answer:
Hydra possesses many testes and one ovary.