Which one of the following is an example of cleistogamy?
Sunflower
Vallisneria
Commelina
Calotropis
Large, colourful, fragrant flowers with nectar are seen in
In nature, cleistogamous flowers are
Progeny produced as a result of cross pollination
Which one of the following is not a correct explanation of cross-pollination?
Sperm cells of angiosperms differ from the rest of the plant groups like gymnosperms by