List of top Biology Questions on Pre-Fertilisation: Structures And Events

How many microsporangia are found in a monothecous anther?

Sporopollenin, a chemical substance is found in________

The technical term used for the androecium in a flower of china rose (Hibiscus rosasinensis) is

The pollination of two flowers on different plants is known as

The pollen grain is related to the embryo sac as

Synergids are

In a monoecious plant

Sporopollenin is chemically

If root of a flowering plant has $24$ chromosomes, then its gamete has how many chromosomes?

Male gamete in angiosperm is produced by

Growth of pollen tube towards embryo sac is

The arrangement of the nuclei in a normal embryo sac in the dicot plants is-

Larger nucleus in a pollen grain is

Through which cell of the embryo sac, does the pollen tube enter the embryo sac?

Stalk with which ovules remain attached to placenta is called

For the formation of tetrasporic embryosac, how many megaspore mother cells are required?

In a flowering plant, megaspore develops into an embryo sac, which contains:

The megaspore mother cell undergoes mitosis to produce four megaspores. Megaspore mother cells and the megaspores are both haploid.

Biologically most resistant plant material is:

Syngamy means

The tapetum

Refer to the given diagrams showing different types of syngamy and select the option that gives correct example of each of these.

Refer the following figures and identify the type of gametes ($A$, $B$ and $C$) respectively.

Study of pollen grains is called

Starting from the innermost part, the correct sequence of parts in an ovule are