Draw a longitudinal section of a flower and label its parts. Explain pollination and fertilisation, and what happens after fertilisation.

1. 1 · Define in one line. Pollination is the transfer of pollen from anther to stigma; fertilisation is the fusion of the male and female germ cells.
2. 2 · Pollination. Self-pollination within the same flower, or cross-pollination to another flower by wind, water or animals.
3. 3 · Fertilisation. A pollen tube grows through the style to the ovule; the male germ cell fuses with the egg to form a zygote.
4. 4 · After fertilisation.
   • Zygote → embryo.
   • Ovule → seed with a tough coat.
   • Ovary → fruit.
   • Petals, sepals, stamens, style and stigma shrivel and fall.
5. 5 · Draw the flower. [Diagram: sepal, petal, stamen (anther, filament), pistil (stigma, style, ovary, ovule)]
6. 6 · Link to daily life. Bees in a mustard or sunflower field carry pollen from flower to flower.
7. 7 · Close in one line. So the flower is the organ of sexual reproduction in a plant.

Scoring tip: Group the labels: stigma, style and ovary under pistil (your textbook's word for the carpel); anther and filament under stamen.