TEST 1 STUDY GUIDE - TEST 1 STUDY GUIDE 1.1What are Plants...

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TEST 1 STUDY GUIDE 1.1…What are Plants? - photosynthesis- the production of organic food from inorganic molecules (carbon dioxide and water), with the use of light energy - Most plants are photosynthetic, but not all…parasites obtain organic food from other organisms - Some people think of fungi as plantlike b/c of their features o Cells of fungi are enclosed by organic walls (like in plants) o Plant cell walls, however, are composed of cellulose, a material made of linked sugar units o Fungi has walls composed of chitin and don’t use photosynthesis - Many bacteria are photosynthetic but much simpler structure than plants - Protists- organisms that are not bacteria, archaea, fungi, plants , or animals also include many photosynthetic forms-ALGAE - PLANTS defined as organisms that 1. Are composed of many cells 2. Have cellulose-rich cell walls 3. Have chlorophyll and are photosynthetic and 4. Are adapted in many ways to life on land - Many ways to adapt plants to land conditions o One is a multicellular embryo- a young stage that develops from a fertilized egg within a mother plant’s tissues o b/c all groups of land-adapted plants posses such embryos, plants are often known as embryophytes - Embryophytes o Mosses and other simple plants known as bryophytes o Club mosses- lycophytes o Ferns and fern relatives- pteridophytes o Seed bearing gymnosperms, such as pine trees o Flowering plants- angiosperms 1.4…Scientific Methods used to learn about nature - Science is empirical, meaning it’s based on scientific methods of observation, measurement, and experiment - Experiment- a manipulation designed to test validity of an idea o Exps always contain unmanipulated control and many replicates o Science works well by raising questions and indicating further investigations - Science include an error-correction capacity o Scientific method of observation, measurement, and
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experimentation o Scientific process characterized by skepticism - Process of science inductive or deductive o Inductive- scientists take measurements, make observations, analyze data and after a lot of work, make a “theory” o Theory- a broad explanation for diverse phenomena based on a large amount of info o Deductive- begins with a hypothesis 2.1…Ethnobotany - Ethnobotany- the scientific study of past human uses of plants or present-day plant uses by traditional socieities - Economic botany is concerned with use of plants by modern industrialized societies -
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