Which of the following methods is commonly used for propagating orchids?

• A. Layering
• B. Tissue culture
• C. Cuttings
• D. Grafting

Answer: (B)

Verified step by step guidance

1. Understand the concept of plant propagation: Plant propagation is the process of creating new plants from a variety of sources such as seeds, cuttings, or other plant parts.
2. Identify the methods listed: The problem provides four methods - Layering, Tissue culture, Cuttings, and Grafting.
3. Learn about tissue culture: Tissue culture is a technique where plant cells, tissues, or organs are grown in a sterile environment on a nutrient culture medium. It is commonly used for orchids because it allows for the mass production of plants with desirable traits.
4. Compare the methods: Layering involves rooting a part of the plant while it is still attached to the parent plant. Cuttings involve rooting a severed piece of the plant. Grafting involves joining two plant parts together. Tissue culture, however, is more suitable for orchids due to its efficiency in producing large numbers of plants.
5. Conclude why tissue culture is preferred: Tissue culture is preferred for propagating orchids because it allows for the rapid production of large numbers of genetically identical plants, ensuring uniformity and quality.