The rate of appearance of new forms is linked of the life cycle or the life. Span. True/false

Answer

**Step-by-Step Solution:**

1. **Understanding the Statement**: The statement claims that the rate of appearance of new forms (or species) is linked to the life cycle or life span of organisms. We need to analyze this relationship.

2. **Defining Key Terms**:
- **Life Cycle**: The series of stages an organism goes through from birth to reproduction and death.
- **Life Span**: The length of time an organism lives.

3. **Analyzing Variation**: Variations in organisms are crucial for evolution. The rate at which new forms appear is influenced by how quickly these variations can occur and be selected for.

4. **Short Life Span and Rapid Reproduction**: Organisms with shorter life spans, such as microbes, reproduce quickly and can generate a high degree of variation in a short period. This rapid reproduction allows new forms to emerge more quickly.

5. **Long Life Span and Slow Reproduction**: In contrast, organisms with longer life spans, like fish or elephants, reproduce more slowly. Therefore, the appearance of new forms or species takes much longer, often spanning millions of years.

6. **Conclusion**: Given that organisms with shorter life spans can show a high degree of variation and thus lead to the rapid appearance of new forms, while those with longer life spans do so much more slowly, we conclude that the statement is true.

**Final Answer**: True.

---