Biotic potential is the intrinsic rate of natural increase but is not allowed by environmental resistance.

Answer

To determine whether the statement "Biotic potential is the intrinsic rate of natural increase but is not allowed by environmental resistance" is true or false, we can break down the concepts involved:

### Step-by-Step Solution:

1. **Define Biotic Potential**:
- Biotic potential refers to the maximum reproductive capacity of an organism under optimal environmental conditions. It is often denoted by the symbol 'r' and indicates the intrinsic rate at which a population can grow if there are no limiting factors.

2. **Understand Environmental Resistance**:
- Environmental resistance encompasses all the factors that limit the growth of a population. These factors include predation, disease, competition for resources, and other ecological pressures that can prevent a population from reaching its biotic potential.

3. **Relationship Between Biotic Potential and Environmental Resistance**:
- While biotic potential represents the maximum growth rate, environmental resistance acts as a counterbalance. It prevents populations from growing indefinitely by introducing limitations that affect survival and reproduction.

4. **Evaluate the Statement**:
- The statement claims that biotic potential is not allowed by environmental resistance. This means that while biotic potential exists, it is not fully realized due to environmental resistance. This is accurate because environmental factors indeed restrict the growth of populations, preventing them from achieving their biotic potential.

5. **Conclusion**:
- Since the statement accurately reflects the relationship between biotic potential and environmental resistance, we conclude that the statement is **true**.

### Final Answer:
The statement is **True**.

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