EBK CAMPBELL BIOLOGY
EBK CAMPBELL BIOLOGY
11th Edition
ISBN: 8220103613828
Author: Reece
Publisher: PEARSON
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Chapter 39, Problem 11TYU

SCIENCE. TECHNOLOGY, AND SOCIETY Describe how our knowledge about the control systems of plants is being applied to agriculture or horticulture.

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You are an amateur gardener and are reading an article that explains that plants need only five basic factors for growth: sunlight, water, air, nutrients, and a substrate on which to grow (soil). You want to investigate the role that these variables play in plant growth.  You decide to test the substrate and see if changing substrate mixes will affect plant growth. Match the following experimental components with their descriptions.    Experimental Components: ( Experimental Variable, Dependent Variable, Control Condition, Independent Variabe, A Confounding Variable That Must Be Held Constant)   1. type of substrate used:   2. growth resulting from substrate type   3. amount of water needed in all plants   4. substrate that is changed during the experiment   5. substrate that is not changed during the experiment
You hypothesise that plants will grow faster if they receive more fertiliser. Briefly explain how you would experimentally test this hypothesis by describing the experimental and control groups, independent-, dependent- and control variables
Doug Schemske is a biologist who studies plants from around the world.  Doug and his research team carry out experiments with the plant species Mouse-ear Cress, or Arabidopsis thaliana. They like this species because it is easy to grow in both the lab and field. Arabidopsis is very small and lives for just one year. It grows across most of the globe and in a wide range of latitudes and climates. Arabidopsis is also able to pollinate itself and produce many seeds, making it possible for researchers to grow many individuals to use in their experiments.  Doug chose Arabidopsis populations in Scandinavia and the Mediterranean for his research on local adaptation because those two locations have very different climates. The populations may have adapted to have the highest survival and reproduction based on the climate of their home location.  To deal with sudden freezes and cold winters in Scandinavia, plants may have evolved freeze tolerance traits, which produces chemicals that act like…

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EBK CAMPBELL BIOLOGY

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How do Plants Handle Stress?; Author: Alex Dainis;https://www.youtube.com/watch?v=TYsnveEHqec;License: Standard Youtube License