If a tree flowers thrice in a year (October, January and july) in nothern india, it is said to be

Options

A. photo-and thermosensitive
B. photo- and thermo insensitive
C. photo-sensitive and thermoinsensitive
D. thermosensitive and photoinsensitive

Answer

To determine the classification of a tree that flowers thrice a year (in October, January, and July) in Northern India, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Flowering Months**: The tree flowers in October, January, and July. These months correspond to different seasons in Northern India—October is autumn, January is winter, and July is monsoon.

2. **Understand the Seasonal Variations**: Each of these months has distinct variations in temperature and photoperiod (length of day). For instance:
- October: Cooler temperatures, shorter days.
- January: Coldest temperatures, longer nights.
- July: Warm temperatures, longer days.

3. **Factors Affecting Flowering**: Flowering in plants is influenced primarily by two factors:
- **Photoperiod**: The length of day and night.
- **Temperature**: Certain temperatures can induce flowering (e.g., vernalization).

4. **Classify the Plant Based on Flowering**:
- **Short Day Plants**: Require longer nights to flower.
- **Long Day Plants**: Require longer days to flower.
- **Neutral Plants**: Not affected by the length of day or night.

5. **Analyze the Given Information**: Since the tree flowers in all three seasons, it suggests that it is not strictly dependent on either photoperiod or temperature for flowering.

6. **Conclusion**: The tree is likely to be classified as both photoperiod and thermosensitive (meaning it can flower regardless of the length of day or temperature). Therefore, it can be termed as "photo and thermo insensitive."

### Final Answer:
The tree is said to be **photo and thermo insensitive**.

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