End of juvenile/vegetative phase and beginning of (sexual) reproductive phase can be easily seen in

Options

A. An annual like rice plant
B. In a biennial like radish plant
C. A perennial like century plant
D. All of the above

Answer

To solve the question regarding the end of the juvenile/vegetative phase and the beginning of the sexual reproductive phase, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Phases**:
- The juvenile or vegetative phase is the period of growth before an organism reaches sexual maturity. This phase is characterized by growth and development, but no reproduction occurs.
- The reproductive phase is when the organism is capable of producing offspring.

2. **Identifying Types of Plants**:
- **Annual Plants**: These plants complete their life cycle in one year. Example: Rice plant.
- **Biennial Plants**: These plants take two years to complete their life cycle. Example: Radish plant.
- **Perennial Plants**: These plants live for more than two years and can reproduce multiple times. Example: Sensory plant.

3. **Analyzing Each Option**:
- **Option 1 (Annual - Rice Plant)**: The transition from juvenile to reproductive phase is clear as rice plants grow quickly and reproduce within a single season.
- **Option 2 (Biennial - Radish Plant)**: The transition is also evident as radish plants grow in the first year and flower in the second year.
- **Option 3 (Perennial - Sensory Plant)**: These plants also show a clear transition from vegetative growth to reproduction over multiple years.
- **Option 4 (All of the Above)**: Since all types of plants (annual, biennial, and perennial) exhibit a clear transition from the juvenile phase to the reproductive phase, this option is valid.

4. **Conclusion**:
- Since the transition from juvenile to reproductive phase can be observed in all the mentioned types of plants, the correct answer is **Option 4: All of the Above**.

### Final Answer:
**The end of the juvenile/vegetative phase and the beginning of the sexual reproductive phase can be easily seen in all of the above (Option 4).**

---