Pollination and Fertilisation

Biology

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Pollination

The process in which pollen grains are transferred from the anther to the stigma.

Examples of pollinating agents

Insects, mammals, birds, water or wind.

The substance that triggers the process of fertilisation

The presence of pollen grain on the stigma

While moving along the pollen tube, the generative nucleus will divide by

Mitosis to produce two male gametes.

The tissue of the style is digested by:

An enzyme that secreted at the end of the pollen tube.

The nucleus that will degenerate when it reaches the embryo sac:

Tube nucleus

One male gamete fertilizes the egg cell will produce:

A diploid zygote

One male gamete fuses with two polar nuclei will produce

Triploid endosperm nucleus

Importance of zygote formation in double fertilisation:

Carry genetic information to another generation & restore haploid condition in gamete by forming a diploid zygote.

Importance of endosperm tissue formation in double fertilisation:

The tissue is used for the development of an embryo for the survival of plant species.

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