The sequence of events occuring during the entire lifespan of living organisms

Options

A. Juvenile phase-Mature phase-Old age-Death
B. Mature phase-Juvenile phase Old age-Death
C. Old age-Mature phase-Jevenile phase = Death
D. Juvenile phase-old age-Mature phase-Death

Answer

### Step-by-Step Text Solution:

1. **Understanding the Lifespan of Living Organisms**: The lifespan of living organisms includes a sequence of events or stages that they go through from the beginning of their life until death.

2. **Identifying the Main Stages**: There are four main stages in the lifespan of living organisms:
- **Juvenile Phase**: This is the initial stage where the organism is not yet reproductively mature. During this phase, the organism grows and develops but does not reproduce.

- **Mature Phase**: In this stage, the organism reaches reproductive maturity. This means it can reproduce and give rise to offspring. This phase is crucial for the continuation of the species.

- **Old Age**: After the mature phase, organisms enter old age. In this stage, they continue to reproduce, but signs of aging begin to appear. The body starts to deteriorate, and various organs may begin to fail or show symptoms of aging.

- **Death**: This is the final stage of the lifespan. In this phase, the organism's organs cease to function, leading to the end of life.

3. **Summarizing the Sequence**: The correct sequence of events in the lifespan of living organisms is:
- Juvenile Phase
- Mature Phase
- Old Age
- Death

4. **Conclusion**: Therefore, the correct answer to the question regarding the sequence of events occurring during the entire lifespan of living organisms is:
- **Juvenile Phase → Mature Phase → Old Age → Death**.