Seeds and Fruits

Alternation of Generations All plants have a life cycle in which a diploid sporophyte generation alternates with a haploid gametophyte generation.

Moss have a dominant gametophyte Non-vascular

Ferns have a dominant sporophyte Vascular

Gymnosperm Lifecycle Vascular Wind pollinated!

Structure of Flowers Vascular

Seed Development

Seeds

Fruit Development As angiosperm seeds mature, the ovary walls thicken to form a fruit that encloses the seeds that developed from the ovules.

Fruit Structure

Types of Fruits Hip Hesperidium Accessory Berry Pome Drupe Caryopsis Capsule Pepo Achene Multiple Nut Legume Samara SchizocarpSilique Follicle

Animal Pollination & Dispersal

Wind Pollination & Dispersal

Animal Pollination

Seed Development Hypocotyl – embryo attaches to cotyledons. Radicle – embryonic root Epicotyl – will develop into stem. Plumule – develops into first leaves. Scutellum – absorbs nutrients during germination. Coleorhiza – sheath that covers young root. Coleoptile – covers shoot

Seed Germination Monocot Dicot

Seeds and Fruits Lab

Plant Propagation & Agriculture  Vegetative reproduction includes the production of new plants from horizontal stems, cuttings, leaves, plantlets, and underground roots.  Horticulturists use plant propagation to make many identical copies of a plant or to produce offspring from seedless plants.  Most of the people of the world depend on a few crop plants, such as wheat, rice, and corn, for the bulk of their food supply. Peanut Flower

Okra

Peach