Epiphytes are

Options

A. fungi that attack plants.
B. fungi that form mutualistic associations with roots.
C. nonphotosynthetic parasitic plants.
D. plants that grow on other plants.

Answer

**Step-by-Step Solution:**

1. **Understanding the Term "Epiphytes":**
- Epiphytes are defined as plants that grow on the surface of other plants. They do not harm the host plant but rather live on it.

2. **Identifying Characteristics of Epiphytes:**
- Epiphytes derive moisture and nutrients from the air, rain, and debris that collects around them. They are typically found in tropical rainforests and can include species such as orchids and bromeliads.

3. **Distinguishing Epiphytes from Other Organisms:**
- It is important to differentiate epiphytes from fungi and parasitic plants.
- Fungi that attack plants are not epiphytes; they are pathogens.
- Fungi that form mutualistic associations with roots (like mycorrhizae) are also not epiphytes.
- Non-photosynthetic parasitic plants derive nutrients from their host and do not perform photosynthesis, which is contrary to the nature of epiphytes.

4. **Conclusion:**
- Based on the definitions and characteristics, the correct identification of epiphytes is that they are plants that grow on other plants.

**Final Answer:**
Epiphytes are plants that grow on the surface of other plants.

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