Pollen grains of which of the following plants typically lose their viability within 30 minutes of their release?

Step-by-step solution

The period for which pollen grains remain viable is highly variable and depends on prevailing temperature and humidity. In some cereals such as wheat and rice, pollen grains lose viability within 30 minutes of their release. In members of Rosaceae (e.g., apple, rose), Leguminosae (e.g., pea, gram), and Solanaceae (e.g., potato, tomato), pollen grains maintain viability for months. Answer: Wheat and Rice