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Ch. 27 – What is a Plant?

Ch. 27 – What is a Plant?. Pg. 559 Why do you & I need plants? Food, medicines, oxygen, clothing, ect. Cultivating or growing plants began in the middle East approximately 11,000 years ago Wheat & Barley were the 1 st crops Why would people rather cultivate crops than let them grow wild?

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Ch. 27 – What is a Plant?

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  1. Ch. 27 – What is a Plant? • Pg. 559 • Why do you & I need plants? • Food, medicines, oxygen, clothing, ect. • Cultivating or growing plants began in the middle East approximately 11,000 years ago • Wheat & Barley were the 1st crops • Why would people rather cultivate crops than let them grow wild? • Better production, disease resistant, drought tolerant.

  2. 4 main groups of food plants • 1. Cereals – wheat, corn , rice, oats, ect. • 2. Legumes – produce seeds that are covered in pods. • Peas, soybeans, peanuts • 3. Root Crops – store nutrients in the roots. • Carrots, potatoes, radishes • 4. Fruits – mature ovaries that surround the seeds of the plant • Berries  tomatoes, blueberries, cranberries • Pome  apple & pear • Nuts  walnut, pecan, almonds, coconut • Table 29-1 (pg. 562)

  3. Is it possible to go 1 day without using a plant product? • What are some medicines that come from plants? • Aspirin – Salicylic acid • Most of our clothes comes from plants. • Cotton, linens (flax plant) • What are some other important uses? • Paper, oils, sugars, waxes, rubber • Other nonfood uses of plants? • Dyes, fuels, building, etc. • Table 29-3

  4. Taxonomy of Organisms • 7 Levels of Classification • 1. Kingdom • 2. Phylum • 3. Class • 4. Order • 5. Family • 6. Genus • 7. Specific Epithet (species) • Genus and Specific Epithet are underlined • Specific Epithet is lower case

  5. Plant & The Environment • Plant Ecology – interaction between plants and the environment. • Examples: amount of light needed, amount of fertilizer needed, soil contents, etc. • Name some strategies plants use for attracting insects. • Smell, color, size, shape, etc. • Plants also rely on bacteria and fungi for growing strategies.

  6. Most plants use mycorrhizoids (lumps in the roots) due to a fungus, which provides more absorption. • Most plants rely on bacteria in the soil to consume nitrogen in the air and make it useful for the plants as a fertilizer. • Plants are very creative when it comes to survival. • Seed dispersal, pollen dispersal, leaf arrangement to capture light, some are poisonous, some are harmful (tobacco, cocaine, opium),

  7. Meiosis – Reduction of division • Mitosis – Cell division • Vegetative growth • How gametes are produced • Egg & sperm are produced by meiosis. • Video Clip • Video Clip • REVIEW THE SCIENTIFIC METHOD

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