In animals, juvenile phase is followed by

Options

A. vegetative phase
B. reproductive phase
C. senescent phase
D. old age

Answer

**Step-by-Step Text Solution:**

1. **Understanding the Juvenile Phase**: The juvenile phase in animals refers to the period of growth that occurs after birth and continues until the organism reaches sexual maturity. This phase is characterized by significant physical development and growth.

2. **Identifying the Next Phase**: After the juvenile phase, the next significant phase in an animal's life cycle is sexual maturity. This is the stage where the organism becomes capable of reproduction.

3. **Phases of Lifespan**: The lifespan of an animal can be divided into several phases:
- Birth
- Juvenile Phase (growth phase)
- Sexual Maturity (reproductive maturity)
- Old Age (senescence)
- Death

4. **Evaluating the Options**:
- **Option A: Vegetative Phase** - This term is used for plants and does not apply to animals, so it is incorrect.
- **Option B: Reproductive Phase** - This is the correct answer as it corresponds to the phase after the juvenile phase where the organism can reproduce.
- **Option C: Senescence Phase** - This refers to old age and occurs after the reproductive phase, making it incorrect.
- **Option D: Old Age** - Similar to option C, this phase comes after the reproductive phase, so it is also incorrect.

5. **Conclusion**: The phase that follows the juvenile phase in animals is the reproductive phase, which is marked by the ability to reproduce.

**Final Answer**: The juvenile phase in animals is followed by the reproductive phase.

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