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.