Plant Classes and Life Cycles

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Presentation transcript:

Plant Classes and Life Cycles Plant Science

Classification of Plants Four Major Groups gymnosperms angiosperms mosses ferns www.OneLessThing.net

Gymnosperms plants that produce seeds not protected by fruit means "naked seed" in Greek examples: pines, firs, spruces redwood ginkgo www.OneLessThing.net

Angiosperms plants that flower and produce seeds protected by fruit or pods means "covered seed" or "enclosed seed" in Greek made up of two classes: monocotyledons (a.k.a. "monocots") dicotyledons (a.k.a. "dicots") www.OneLessThing.net

Characteristics of Moncots seeds have one cotyledon seedlings have one seed leaf vascular bundles are scattered leaves have parallel veins flower parts are in multiples of 3 www.OneLessThing.net

Characteristics of Dicots seeds have two cotyledons seedlings have two seed leaves vascular bundles are arranged in a circle leaves have netted veins flower parts are in multiples of 4 or 5 www.OneLessThing.net

Plant Taxonomy Scientific naming system used today is called binomial nomenclature developed by Linnaeus; names are in Latin and written in italics the first name is the genus the second name is the species species can be further subdivided into varieties www.OneLessThing.net

Life Cycles of Plants Three Major Groups annuals biennials perennials www.OneLessThing.net

Annuals plants that complete their life cycle in one year examples: tomatoes marigolds pansies www.OneLessThing.net

Biennials plants that complete their life cycle in two growing seasons examples: hollyhock parsley www.OneLessThing.net

Perennials plants that produce for more than two years divided into two classes: herbaceous woody www.OneLessThing.net

Two Classes of Perennials herbaceous: plants that have soft stems that are killed by frost perennials: have stems and buds that can survive winter frost (trees for example) www.OneLessThing.net

Thank you for learning with us! www.OneLessThing.net