Sexual Reproduction in Plants

Sexual reproduction lecture for middle grade.

1. Sexual Reproduction

2. Vocabulary cross-pollination dispersal f ertilization germination s elf-pollination

3. Sexual reproduction it involves the male and female parts of the flower. It has four stages: pollination fertilization fruit and seed dispersal germination

4. Pollination it is the transfer of pollen grains from anther to a stigma. Pollination is usually carried out by insects such as bees and butterflies, wind and water.

5. Self-pollination t ransfer of pollen grains within one flower. Pollen grains from the anther are transferred onto the stigma.

6. Cross-pollination the transfer of pollen from the flower of one plant to the flower of a plant having a different genetic constitution .

7. Fertilization After pollination, the pollen grain germinates on the stigma and produces pollen tube.

8. After fertilization , the flower petals wither and drop off. The ovary becomes the fruit while the ovule develops into a seed.

9. Seed and fruit dispersal Seeds and fruits are dispersed by wind and water. Some seeds and fruits are dispersed by man and animals.