Phytophagous are

Options

A. the insects that feed on plant sap
B. the phagocytosing cells of plants that kills the plant pathogens
C. the virus that eats plant cells
D. none of these

Answer

**Step-by-Step Solution:**

1. **Understanding the Term "Phytophagous":**
- The term "phytophagous" is derived from two Greek words: "phyto," which means plant, and "phagus," which means to eat or feed on. Therefore, phytophagous organisms are those that feed on plants.

2. **Identifying the Organisms:**
- Phytophagous organisms are primarily insects. These insects consume various parts of plants, including roots, stems, leaves, flowers, and fruits.

3. **Life Stages of Phytophagous Insects:**
- Both the larval and adult stages of these insects can be phytophagous, meaning they can feed on plants during either stage of their life cycle.

4. **Classification:**
- Phytophagous insects are mainly classified under the phylum Arthropoda, specifically within the class Insecta. They are often found in various families, including the mites.

5. **Evaluating the Options:**
- The first option states that phytophagous are insects that feed upon plants, which is correct.
- The second option suggests that they are phagocytosine cells that kill plant pathogens, which is incorrect.
- The third option claims that they are viruses that eat plant cells, which is also incorrect.

6. **Conclusion:**
- Based on the definitions and classifications discussed, the correct answer is that phytophagous are insects that feed upon plants.

**Final Answer:**
- Phytophagous are insects that feed upon plants.

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