Monoestrous animals have one:

Options

A. One ovulation each month
B. One egg
C. One breeding season in a year
D. one menses each month

Answer

To solve the question regarding monoestrous animals, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Monoestrous Animals**:
- Monoestrous animals are defined as those that have only one estrous cycle in a year. This means they go through a reproductive cycle that occurs once annually.

2. **Defining Estrous Cycle**:
- The estrous cycle refers to the series of physiological changes that occur in the female reproductive system, primarily in non-primates, as they prepare for potential mating and pregnancy.

3. **Analyzing the Options**:
- **Option 1: One ovulation each month**: This is incorrect because monoestrous animals do not have monthly cycles; they have one cycle per year.
- **Option 2: One egg**: This is also incorrect. While monoestrous animals may release one egg during their estrous cycle, the term "one egg" does not accurately describe the characteristic of being monoestrous.
- **Option 3: One breeding season in a year**: This is correct. Since monoestrous animals have only one estrous cycle each year, they will also have only one breeding season in that year.
- **Option 4: One menses each month**: This is incorrect because monoestrous animals do not have a menstrual cycle; they have an estrous cycle.

4. **Conclusion**:
- Based on the analysis of the options, the correct answer is that monoestrous animals have **one breeding season in a year**.

### Final Answer:
Monoestrous animals have **one breeding season in a year**.

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