Which one is example of holoparasite?

Options

A. Cuscuta
B. Viscum
C. Loranthus
D. Sea anemone

Answer

To determine which option is an example of a holoparasite, we need to understand what holoparasites are and analyze the given options.

### Step-by-Step Solution:

1. **Define Holoparasite**:
- Holoparasites are plants that are completely dependent on their host plants for nutrition. They lack chlorophyll and are unable to perform photosynthesis, meaning they cannot produce their own food.

2. **Characteristics of Holoparasites**:
- They do not have chlorophyll, which results in colors like yellow, red, or orange instead of green.
- They cannot assimilate carbon dioxide or other inorganic nutrients from the environment.
- They typically attach to the host plant either through the stem or root.

3. **Analyze the Options**:
- **Option A: Cascata**: This is a known holoparasite. It fits the definition as it lacks chlorophyll and depends entirely on its host for nutrition.
- **Option B: Viscum**: This is a hemiparasite, meaning it can photosynthesize to some extent and is not a complete holoparasite.
- **Option C: Loranthus**: Similar to Viscum, Loranthus is also a hemiparasite, capable of photosynthesis.
- **Option D: Sea Animal**: This option is not a plant and therefore cannot be classified as a holoparasite.

4. **Conclusion**:
- Based on the definitions and characteristics of holoparasites, the correct answer is **Option A: Cascata**.

### Final Answer:
**The example of a holoparasite is Option A: Cascata.**