Question

Orchid seeds are

• A. Light and dry
• B. Small and sticky
• C. Large and heavy
• D. Dry and heavy

Answer 1

Answer: (A)

Light and dry

Orchid seeds are extremely small and contain an undifferentiated embryo that lacks endosperm. A single seed pod produces a large number of small seeds, which are ideally suited for dispersal by wind. They are very light weight and dry. Orchid seeds need the presence of a fungus (mycorrhiza) in order to germinate and grow in nature. The fungus apparently penetrates the seed and contributes to the growth of the seedling by producing or supplying some of the necessary nutrients for growth. It has not yet been firmly established whether or not the fungus is necessary for the continued growth of the mature plant, but it appears likely that the presence of the fungus aids in the uptake of nutrients and prevents the leaching of nutrients from the root material of epiphytic species. The seeds are not sticky and large.
Therefore, the correct answer is option A.