`{:("Zoospore,","Conidia,","Tuber,"),("Offset,","Pollen,","Zygote,"):}`
From the structure given in above box how many are not associated with asexual reproduction ?

Options

A. Three
B. Two
C. Four
D. One

Answer

To determine how many structures from the given list are not associated with asexual reproduction, we will analyze each structure one by one.

### Step-by-Step Solution:

1. **Identify the Structures**: The structures given are:
- Zoospore
- Conidia
- Tuber
- Offset
- Pollen
- Zygote

2. **Define Asexual Reproduction**: Asexual reproduction involves a single organism producing offspring without the involvement of gametes (sex cells). It typically results in offspring that are genetically identical to the parent.

3. **Analyze Each Structure**:
- **Zoospore**: This is a motile spore that is produced asexually by certain algae and fungi. **(Asexual)**
- **Conidia**: These are asexual spores produced by fungi. **(Asexual)**
- **Tuber**: This is a storage organ in plants (like potatoes) that can give rise to new plants asexually. **(Asexual)**
- **Offset**: This is a small plant that develops from the parent plant and is a form of vegetative reproduction. **(Asexual)**
- **Pollen**: This is the male gamete in plants and is involved in sexual reproduction. **(Sexual)**
- **Zygote**: This is the diploid cell formed by the fusion of two gametes during fertilization, thus it is a product of sexual reproduction. **(Sexual)**

4. **Count the Structures Not Associated with Asexual Reproduction**:
- From the analysis, we find that:
- Pollen: Not asexual
- Zygote: Not asexual
- Therefore, there are **2 structures (Pollen and Zygote)** that are not associated with asexual reproduction.

5. **Conclusion**: The total number of structures not associated with asexual reproduction is **2**.