Question

Heterostyly as a contrivance for cross-pollination is found in

• A. Pennisetum
• B. Impatiens
• C. Primula vulgaris
• D. Oenothera

Answer 1

Answer: (C)

Heterostyly is the presence of $2-3$ types of flower with different heights of styles and stamens. In diheterostyly (dimorphic heterostyly), there are two types of flower, pin eyed (long style and short stamens) and thrum eyed (short style and long stamens), e.g., Primula vulgaris (primrose), jasmine.