Pollen grains of different species show characteristic difference in

Options

A. Shapes, size and colours only
B. Shapes, sizers, colours and ploidy only
C. Shapes, sizes, colour and design only
D. Ploidy only

Answer

### Step-by-Step Solution:

1. **Understanding Pollen Grains**: Pollen grains are the male gametophytes in flowering plants and are crucial for the process of fertilization. They vary significantly among different species.

2. **Identifying Characteristics**: The characteristics that differentiate pollen grains from various species include:
- **Shape**: Pollen grains can be spherical, oval, or irregularly shaped.
- **Size**: The size of pollen grains can vary, with some being very small and others larger.
- **Color**: Pollen grains may exhibit different colors depending on the species.
- **Ornamentation/Design**: The outer wall of pollen grains (exine) can have unique patterns or textures, which is referred to as ornamentation.

3. **Analyzing Options**:
- **Option 1**: "Shape, size, and color only" - This is incorrect because it does not include ornamentation.
- **Option 2**: "Shapes, size, colors, and ploidy" - This is incorrect because all pollen grains are haploid (n) and do not differ in ploidy.
- **Option 3**: "Shape, size, color, and design" - This is correct as it includes all the relevant characteristics including ornamentation.
- **Option 4**: "Ploidy" - This is incorrect as all pollen grains share the same ploidy level.

4. **Conclusion**: Based on the analysis, the correct answer is **Option 3: Shape, size, color, and design**.