Ratio between number of stamens and carpels in onion flower is

The number of stamens in tulip is :-

ratio between number of satamens in male flower and number of carpels in female flowers in Euphorbia is

" Ratio between number of bundles of stamens in china rose and pea is "

Rose has several whorls of petals, stamens and carpels. Its flower is

Number of stamens present in malvaceae is

Arrange the following taxa in a descending order based on number of stamens present in a flower I)Pea II)Euphorbia III)Mustard IV)Makoi

Identify the wrong pair of statements I. Number of stamens in 5 flowers of Allium is equal to those in 5 flowers of Solanum II. The microporangia of Hibiscus and Asparagus are having 80 pollen grains each. Then the ratio of number of pollen grains produced from each stamen of these two plants in 1:1 III. The ratio of number of stamens in the flowers of Pisum and Datura is 2:1 IV. The number of carpels in a flower of Smilax is equal to carpels in cyathium inflorescence.

Presence of mechanical barrier between stamen and carpel which prevents self pollination , is known as :

if a flower either only stamens or only carpels it is a _____flower.