Reproduction in plants

Question 1

Describe cross-pollination

Answer 1

The transfer of pollen grains from the anther of a flower to the stigma of a flower on a different plant of the same species.

Question 2

Describe self-pollination

Answer 2

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

Question 3

Describe the fertilisation of a plant.

Answer 3

• After pollination, a pollen tube grows down the style to the ovary.
• Two male gametes move through the pollen tube (sperm).
• when the pollen tube reaches the ovule, the nucleases of the two gametes fuse with the egg cell nucleus thus forming a zygote.
• The zygote later becomes a plant.

Question 4

Describe germination.

Answer 4

The process in which a seed splits and grows into a mature plant.