Flower Parts, Angiosperm Life Cycle, and Seeds

Petal- Petals are used to attract insects into the flower, they may have guidelines on them and be scented. Stigma- Is covered in a sticky substance that the pollen grains will adhere (stick) to. Style- The style raises the stigma away from the Ovary to decrease the likelihood of pollen contamination. It varies in length.

Ovary- This protects the ovule and once fertilization has taken place it will become the fruit. Ovule- The Ovule is like the egg in animals and once fertilization has taken place will become the seed. Flower stalk- Gives support to the flower and elevates the flower for the insects. Sepal- Sepals protect the flower while the flower is developing from a bud.

Filament- This is the stalk of the Anther. Anther- The Anthers contain pollen sacs. The sacs release pollen on to the outside of the anthers that brush against insects on entering the flowers. Once the pollen is deposited on the insect..it is transferred to the stigma of another flower. The ovule is then able to be fertilized.

Male Parts Stamen Female Parts Pistil Anther Filament Ovary Stigma Ovule Style

2 Types of flowers: Perfect vs. Imperfect a flower that has either all male parts or all female parts Imperfect- EX: cucumbers, pumpkin, and melons a flower that has both male and female parts in the same flower Perfect- EX: roses, lilies, and dandelions

Complete vs. Incomplete Flowers Has all 4 main parts Sepal, petal, pistil, and stamen Ex.- Incomplete Flowers One or more of the 4 main parts of flower is missing Ex. -windflower

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Angiosperm Life cycle Pollination-transfer of pollen from the stamen to the pistil. Pollen-yellow powder that contains sperm cells. Pollinators transfer pollen’ Ex.-bees, birds, and other animals

How are pollinators attracted to a flower? Nectar –sweet liquid produced by flowers to attract pollinators. Flowers-colorful petals, interesting shapes, and scent that appeal to pollinators Pollination can also occur with the help of the wind. Ex-grasses and some trees

Seeds Seeds have 3 main parts Embryo-offspring that can grow into a new plant Cotyledon-food supply for the embryo Seed coat- tough outer covering Germination-development of a new seed into a plant

Seed Dispersal Float and carried by the wind Float and be carried by water (coconuts) Cling to animal fur or feathers Seed surrounded by fruit which is eaten by animals then passes through their digestive system