The entry of pollen tube into the ovule through micropyle is called

The phenomenon of pollen tube entering the ovule laterally through integuments is called

A pollen tube enters the ovule through chalaza lying opposite the micropyle. It will enter the embryo sac through

A flower which never opens and its pollen grains germinate inside the anther and their pollen tubes enter the carpels to fertilise the ovules is called

The movement of pollen tube towards embryo sac is

A straight glass tube has two inlets X and Y at the two ends. The length of the tube is 200 cm. HCl gas through inlet X and NH_(3) gas through inlet Y are allowed to enter the tube at the same time. White fumes appear at a point P inside the tube. Find the distance of P from X.

a way of growing crops without disturbing soil through tillage is called-

A line which is perpendicular to the radius of the circle through the point of contact is called a ………

The method of producing thousands of plants through tissue culture is called –

The device that guides the pollen tube in the cavity of ovary is

The transfer of ovum collected from a donor into the fallopian tube of another female is called