Which one secretes pheromones for the function

Options

A. Rhizopus for formation of zygospore
B. All fungi for sexual reproduction
C. Yeast for mating
D. Plants for growth and development

Explanation

### Step-by-Step Text Solution:

1. **Understanding Pheromones**:
- Pheromones are chemical substances secreted by organisms that influence the behavior of other individuals of the same species. They act like hormones but function outside the body.

2. **Identifying the Organisms that Secrete Pheromones**:
- Pheromones are primarily produced by insects and some mammals. However, certain fungi also produce pheromones for mating purposes.

3. **Focusing on the Example of Rhizopus**:
- Rhizopus, a type of fungus, is a good example. It has two mating types, often referred to as plus and minus. These types secrete pheromones to facilitate mating.

4. **Function of Pheromones in Rhizopus**:
- The pheromones secreted by the different mating types of Rhizopus trigger the growth of hyphae, which is essential for the formation of zygospores during sexual reproduction.

5. **Evaluating the Options**:
- The question provides multiple options regarding which organism secretes pheromones for a specific function.
- The correct answer is that Rhizopus secretes pheromones for the function of zygospore formation.

6. **Eliminating Incorrect Options**:
- The other options can be dismissed:
- Not all fungi secrete pheromones for sexual reproduction.
- Yeast primarily reproduces asexually through budding and does not rely on pheromones for mating.
- Plants do not secrete pheromones for growth and development.

7. **Conclusion**:
- Therefore, the correct answer to the question is that Rhizopus secretes pheromones for the function of zygospore formation.