Sexual Reproduction in Plants -...
Transcript of Sexual Reproduction in Plants -...
Page 60-71
The products of sexual reproduction in plants
Angiosperms – flowering plants◦ Seeds form inside flowers
then enclosed in a pod or shell
Gymnosperms – non-flowering plants◦ Seeds made inside cones and
have a seed coat
Neither angiosperms or gymnosperms
Do not make seeds
Contain plant’s reproductive organs
Pistil – female◦ Stigma, style, ovary, ovules
Stamen – male◦ Anther, filament, pollen
THE MALE REPRODUCTIVE PARTS
Anther-
Pollen grains-
Filament-
Stamen-
THE FEMALE REPRODUCTIVE PARTS
Stigma-
Style-
Ovary-
Ovules-
Pistil-
Pollen from anther must reach stigma of pistil
Self-pollination – both gametes come from same plant
Cross-pollination – gametes from flowers of 2 different plants◦ Wind, water, and insects carry pollen
1. Pollen lands on stigma
2. A pollen tube grows down the style to ovary to reach an ovule
3. A sperm travels down the tube to fertilize an egg
4. Egg develops into a seed
5. The fruit (pod or shell) forms around the seed
Gizmo: Pollination Flower to Fruit
You will hand in two labeled proper scientific drawings.
a) The first one will be of the flower in its natural state, not cut open.
b) The second drawing will be of the flower cut in half so you can see its reproductive parts.
Colour female parts one color and male parts another colour.
You will label all of the parts that you can see, in the same style as your textbook does on page 62. Use your textbook to help you, as well as your Gizmo.