Cross pollination is preferred over self pollination because it

Options

A. Produces better offspring
B. Forms new varieties
C. Induces parthenogenesis
D. Is economical.

Answer

**Step-by-Step Solution:**

1. **Definition of Cross-Pollination and Self-Pollination:**
- Cross-pollination is the transfer of pollen grains from the male reproductive organ (anther) of one plant to the female reproductive organ (stigma) of another plant.
- Self-pollination is the transfer of pollen grains from the male reproductive organ to the stigma of the same plant.

2. **Agents of Pollination:**
- Cross-pollination is often facilitated by external agents such as insects and wind, which help in the transfer of pollen between different plants.

3. **Genetic Variation:**
- Cross-pollination promotes genetic diversity by introducing new genetic combinations. This process leads to heterozygosity, which is the presence of different alleles at a gene locus.

4. **New Varieties:**
- The genetic variation resulting from cross-pollination can lead to the formation of new varieties of plants. This is beneficial for adaptation and survival in changing environments.

5. **Comparison with Self-Pollination:**
- In contrast, self-pollination tends to maintain homozygosity, where the genetic makeup remains similar over generations. This can limit genetic diversity and adaptability.

6. **Conclusion:**
- Therefore, cross-pollination is preferred over self-pollination because it produces better offspring, forms new varieties, and enhances genetic diversity.