Ornithophilous and anemophilous flowers are similar in absence of

Options

A. Odour
B. Nectar
C. Colour
D. Small flower

Answer

To solve the question regarding the similarities between ornithophilous and anemophilous flowers, we need to analyze the characteristics of both types of flowers in relation to the given options: nectar, flower size, and odor.

### Step-by-Step Solution:

1. **Understand Ornithophilous Flowers**:
- These are flowers that are pollinated by birds. They often have bright colors and may produce nectar to attract birds.

2. **Understand Anemophilous Flowers**:
- These are flowers that are pollinated by wind. They typically do not have bright colors or produce nectar, as they rely on the wind to carry their pollen.

3. **Examine the Options**:
- **Nectar**: Ornithophilous flowers usually produce nectar to attract birds, while anemophilous flowers do not produce nectar. Therefore, nectar is not absent in ornithophilous flowers.
- **Flower Size**: The size of the flowers can vary in both types. Ornithophilous flowers can be large and showy, while anemophilous flowers can be small. Thus, flower size is not a factor that is absent in both.
- **Odor**: This is a significant point. Ornithophilous flowers may have a pleasant odor to attract birds, while anemophilous flowers generally do not rely on odor for pollination. Therefore, odor is absent in anemophilous flowers.

4. **Conclusion**:
- The correct answer to the question is that both ornithophilous and anemophilous flowers are similar in the absence of **odor**.

### Final Answer:
Both ornithophilous and anemophilous flowers are similar in the absence of **odor**.