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

### Step-by-Step Solution:

1. **Understanding Exponential Growth**: Exponential growth refers to a situation where the growth rate of a population is proportional to its current size, leading to rapid increases in population when resources are abundant.

2. **Types of Growth Curves**: There are two primary types of growth curves:
- **J-shaped curve**: Represents exponential growth where the population grows rapidly without any constraints.
- **S-shaped curve (sigmoid growth)**: Represents logistic growth where the population grows rapidly initially but then slows down as it approaches the carrying capacity of the environment.

3. **Lag Phase**: Initially, populations may experience a lag phase where growth is slow due to factors such as adaptation to the environment or low numbers.

4. **Exponential Growth Phase**: After the lag phase, if resources are unlimited, the population enters a phase of exponential growth where the growth rate is high.

5. **Environmental Resistance**: Exponential growth occurs when there is no environmental resistance. Environmental resistance includes factors that limit population growth, such as limited resources, predation, disease, and competition.

6. **Carrying Capacity**: Each environment has a carrying capacity, which is the maximum population size that can be supported by the available resources. When resources are limited, populations cannot grow exponentially and instead exhibit logistic growth.

7. **Conclusion**: Therefore, exponential growth occurs when there is no environmental resistance, meaning resources are unlimited.

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

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