Sexual Reproduc...

When micropyle, chalaza and hilum lie in a straight line, the ovule is said to be

One of the most resistant biological material present in the exine of pollen grain is

In angiosperms various stages of reductional division can best be studied in

Feathery stigma occurs in

Fragrant flowers with well developed nectaries are anadaptation for

What is the function of germ porę?

Which function of tapetum is correct?

The given diagram shows two plants of the same species. Identify the types of pollination indicated at P₁, P₂ and P₃
 .

How many meiotic divisions are required for the formation of 100 pollen grains?

How many meiotic divisions are necessary for formation of 100 functional megaspores.

During the process of fertilization the pollen tube of the pollen grain usually enters the embryo sac through

Study of pollen grains is called

Pollen kitt is generally found in

Identify the parts labelled A, B, C and D in the given figure and select the correct option.

Heterostyly as a contrivance for cross-pollination is found