Exponential growth occurs when there is

Options

A. a great environmental resistance
B. no environmental resistance
C. no biotic potential
D. a fixed carrying capacity

Answer

To solve the question "Exponential growth occurs when there is", we need to analyze the options provided and understand the conditions that lead to exponential growth in populations.

### Step-by-Step Solution:

1. **Understanding Exponential Growth**: Exponential growth occurs when a population increases at a constant rate over time, leading to a rapid increase in numbers. This typically happens under ideal conditions where resources are abundant.

2. **Evaluating the Options**:
- **Option A: Great Environmental Resistance**: Environmental resistance includes factors that limit population growth, such as limited resources, predation, and disease. High environmental resistance would hinder exponential growth. Thus, this option is incorrect.

- **Option B: No Environmental Resistance**: If there is no environmental resistance, populations can grow without constraints, leading to exponential growth. This option aligns with the definition of exponential growth. Therefore, this option is likely correct.

- **Option C: No Biotic Potential**: Biotic potential refers to the maximum reproductive capacity of an organism under optimal environmental conditions. If there is no biotic potential, it implies that the population cannot grow, which contradicts the concept of exponential growth. Thus, this option is incorrect.

- **Option D: A Fixed Carrying Capacity**: Carrying capacity is the maximum population size that an environment can sustain. If the carrying capacity is fixed, it limits growth, leading to logistic growth rather than exponential growth. Therefore, this option is also incorrect.

3. **Conclusion**: Based on the evaluations, the correct answer is **Option B: No Environmental Resistance**. This condition allows for exponential growth to occur.

### Final Answer:
Exponential growth occurs when there is **no environmental resistance**.