Organisms with very high intrinsic growth rates have

Options

A. Long generation time
B. Short generation time
C. No carring capacity
D. No courtship behaviours

Answer

To solve the question "Organisms with very high intrinsic growth rates have," we need to analyze the options provided and understand the concept of intrinsic growth rates.

### Step-by-Step Solution:

1. **Understanding Intrinsic Growth Rate**:
- The intrinsic growth rate (denoted as 'r') refers to the potential growth of a population under ideal conditions, where resources are unlimited.
- It is calculated as the difference between the birth rate and the death rate.

2. **Factors Affecting Intrinsic Growth Rate**:
- A high intrinsic growth rate indicates that a population can grow rapidly.
- This typically occurs when the birth rate is high and the death rate is low.

3. **Generation Time**:
- Generation time is the average time it takes for an organism to reach reproductive maturity and produce offspring.
- A shorter generation time means that organisms can reproduce more frequently, leading to a higher intrinsic growth rate.

4. **Analyzing the Options**:
- **Option 1: Long generation time** - This would imply that organisms take longer to reproduce, which would not support a high intrinsic growth rate.
- **Option 2: Short generation time** - This suggests that organisms can reproduce quickly, which aligns with a high intrinsic growth rate.
- **Option 3: No carrying capacity** - While carrying capacity relates to population limits, it does not directly correlate with intrinsic growth rates.
- **Option 4: No coercive behavior** - This option is unrelated to growth rates and does not provide relevant information.

5. **Conclusion**:
- Based on the analysis, organisms with very high intrinsic growth rates have a short generation time. Therefore, the correct answer is **Option 2: Short generation time**.