The ornithophilous flowers

Options

A. Phoenix dactylifera
B. Are colourless and nectarless
C. Have a specific odour or scent
D. Are smaller in size

Answer

### Step-by-Step Solution:

1. **Understanding Ornithophilous Flowers**:
- Ornithophilous flowers are those that are specifically adapted to be pollinated by birds. This means they have certain characteristics that attract birds.

2. **Characteristics of Ornithophilous Flowers**:
- These flowers are typically **brightly colored** to attract birds, as birds are attracted to vibrant colors.
- They produce **nectar**, which serves as a food source for the birds, encouraging them to visit the flowers for pollination.
- The size of these flowers is generally **larger**, making them more visible and accessible to birds.

3. **Evaluating the Options**:
- **Option 1**: "Colorless and nectarless" - This is incorrect because ornithophilous flowers are not colorless; they are brightly colored and produce nectar.
- **Option 2**: "Have a specific order or scent" - This is also incorrect since birds are not primarily attracted by scent.
- **Option 3**: "Are smaller in size" - This is incorrect as well; these flowers tend to be larger in size to attract birds effectively.

4. **Correct Answer**:
- Based on the characteristics of ornithophilous flowers, the correct answer is that they are **not colorless, not nectarless, not small in size**, and they are indeed **pollinated by birds**. The example given, **Phoenix dactylifera**, is a type of flower that fits this description.