1. 6.L.1.1 – Structures of Flowering Plants & Flower Fertilization
6th Grade Science
Growing and Flowing
6.L.1.1 – Structures of Flowering Plants & Flower Fertilization

2. Basic Parts of Plants
Leaves: take in carbon dioxide & sunlight to be used in photosynthesis
Stems: support branches, leaves, & flowers
Roots: secures plant in place, absorbs minerals & water, stores energy
LEAVES
STEM
ROOTS

3. Stomata: tiny openings under leaves through which gases and water vapor pass
Guard Cell: paired cells that control the opening & closing of a leaf’s stoma

4. The process of sexual reproduction in flowering plants takes place in the flower, which is made up of several parts.
Some parts of the flower are directly involved in fertilization and seed production. Other flower parts have functions in pollination.

5. Flower parts:
Petals – leaf-like colorful part of a flower used to attract insects and birds
Sepals – modified leafs protect the bud of a young flower
Receptacle – the section where the reproductive parts of a plant are attached

6. Stamens – the male part of a flower
Stamens – the male part of a flower. The stamens include the anther (which produces pollen grains that develop sperm) and the filament (which is a stalk that support the anther)

7. Pistils – the female part of the flower
Pistils – the female part of the flower. The pistils include the stigma (which is the sticky pollen-receptive part of the pistil) the style (which is the stalk of the pistil down which the pollen tube grows) and the ovary (which contain the ovules and becomes the fruit). The ovule becomes the seeds when sperm cells fertilize the egg cells

8. Pollination: When pollen is transferred from the anther to the stigma (if same plant = self pollination; if different plant of same species = cross-pollination). Plants that are cross pollinated produce stronger plants.
Kidsgrowingstrong.org

9. Kidsgrowingstrong.org

10. There are three different ways pollination can occur: through insect/animal transfer, through wind transfer, and through human transfer.

11. How do plants defend themselves?
Secrete bad smells
Secrete poisons
Built in defenses like “thorns”