The rate of appearance of new forms is linked to the life span of an organism. Explain with the help of a suitable example.

Explanation

### Step-by-Step Text Solution:

1. **Understanding the Concept**: The question asks about the relationship between the rate of appearance of new forms (or variations) and the lifespan of organisms. This means we need to explore how quickly new forms can arise based on how long an organism lives.

2. **Defining Lifespan**: Lifespan refers to the duration of time an organism lives. Organisms can have short lifespans (like microbes) or long lifespans (like certain fish or birds).

3. **Variation in Organisms**: Variation is the occurrence of differences among individuals within a population. This can happen due to mutations, genetic recombination, and environmental factors.

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