Define. Viviparous animals.

Answer

**Step-by-Step Solution:**

1. **Understanding the Term**: Begin by breaking down the term "viviparous". The prefix "vivi-" relates to life, and "-parous" relates to bearing or producing.

2. **Definition**: Viviparous animals are defined as those that give birth to live young rather than laying eggs. This means that the young develop inside the mother's body and are born fully formed.

3. **Characteristics**:
- Viviparous animals typically possess mammary glands, which allow them to nurse their young after birth.
- They often have external features such as external ears.

4. **Examples**: Common examples of viviparous animals include:
- Humans
- Goats
- Cows
- Most mammals fall into this category.

5. **Exceptions**: It is important to note that there are exceptions within the mammalian group, such as monotremes (e.g., the platypus and echidna), which lay eggs instead of giving birth to live young.

6. **Final Definition**: In summary, viviparous animals are those that give birth to live offspring, characterized by the presence of mammary glands for feeding their young.

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