Logistic growth occurs when there is

Options

A. no resistance from increasing population
B. unlimited food
C. fixed carrying capacity
D. all of these above

Answer

**Step-by-Step Solution:**

1. **Understanding Logistic Growth**: Logistic growth describes a population's growth pattern that starts exponentially but slows down as the population approaches the environment's carrying capacity.

2. **Population Size Increase**: Initially, the population size increases over time due to abundant resources and lack of competition.

3. **Carrying Capacity**: Every habitat has a maximum number of individuals it can support, known as the carrying capacity. This is the point at which the population stabilizes because the resources become limited.

4. **Resource Limitation**: As the population grows and approaches the carrying capacity, resources such as food, space, and water become limited, leading to increased competition among individuals.

5. **Resistance Factors**: As the population nears its carrying capacity, various resistance factors (like limited food and space) come into play, slowing the growth rate.

6. **Conclusion**: Logistic growth occurs when there is a fixed carrying capacity in the environment, meaning that the population size will eventually level off as it reaches this maximum limit.

**Final Answer**: Logistic growth occurs when there is a fixed carrying capacity in the environment.

---