Chapter 20 - Reproduction in Plants

Self incompatibility

(C) ________- When a pollen grain of a flower happens to land on the stigma of the same flower or another flower on the same plant, a biochemical block prevents the pollen grain from germinating.

zygote

Cell that will divide and develop into the embryo.

micropyle

The opening through which the pollen tube enters the ovule in the ovule wall

ovule

the structure which will develop into a fruit.

generative nucleus

The ________ divides to form two male gametes.

Gametes

reproductive cells that contain half the number of chromosomes as a normal body cell.

endosperm nucleus

The ________ will divide and give rise to the endosperm, a food storage tissue that will nourish the developing embryo.

Self pollination

the transfer of pollen grains from the anther to the stigma of the same flower, or from the anther of a flower to the stigma of another flower on the same plant.

insect

When the ________ enters the flower, pollen grains from the anthers stick onto the ________.

Insect pollinated flowers

The type of pollinated flowers that contain nectar.

Reproduction

the biological process by which new organisms are produced to ensure the perpetuation of the species.

Pollination

the transfer of pollen grains from the anther to the stigma, enabling fertilisation.

Cross pollination

the transfer of pollen grains from the anther of a flower to the stigma of a flower of another plant belonging to the same species.