WARM UP “A weed is but an unloved flower.” –Ella Wheeler Wilcox What does this mean to you? How does this apply to plants and reproduction?

Seed Development and Germination

Ovules Ovule has an embryo, endosperm, and coverings Gets nutrients from plant

Seeds When coverings thicken and seal, food is stored and seed is formed. Seed coat, endosperm, embryo

Seeds Cotyledons Part of the embryo that absorbs nutrients from endosperm so growth can occur

Fruit Ovary ripens as ovule develops Eventually, fruit surrounds seeds

Fruit Types Dry Fruits Legume Achene Nut Samara Caryopsis Has a seam Peanut Achene Many fruits attached to large “wall” Sunflower and strawberries Nut Very hard covering Samara Wing-like structure Caryopsis Fruits/seeds fused to wall

Fruit Types Fleshy Fruits Drupe Hesperidium Pepo Pome Aggregate Large pit in center Plum Hesperidium Thick rind, sections Lemons, limes Pepo Thin rind Cucumber, cantaloupe Pome Flower petals form skin Apple Aggregate Many ovaries in a single flower make multiple fruit sections Blackberries Multiple Many separate flowers make separate fruit sections Pineapple

Germination Seeds take in water, swell, and rupture Seed coat broken by scratching, freezing, fire, etc. More oxygen, more cell division Primary root emerges 1st, then shoot

WRAP UP Name 3 “vegetables” that are actually fruits. Name 3 vegetables that are truly vegetables.