Ten Themes in the Study of Life

May 19th, 2015
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A. What is life? To biologists, life reflects its ancient molecular origins and its degree of organization.B. Life's major themes:1. Each level of biological organization has emergent properties. 2. Cells are the basic unit for both structure and function.

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Chapter 1:Ten Themes in the Study of LifeA. What is life?To biologists, life reflects its ancient molecular origins and itsdegree of organization.B. Life's major themes:1. Each level of biological organization has emergent properties.2. Cells are the basic unit for both structure and function.3. DNA is the genetic material and is the heritable information.4. Structure and Function are related at all levels of organization.5. Open systems: A way of sensing and responding to specificchanges in the environment.6. A way of capturing and using energy and materials (regulationof biochemical reactions)7. Unity and Diversity.8. Evolution is the central theme of biology.9. Science is a process of inquiry (the scientific method).10. Science and technology are functions of society,I. Energy and Lifes OrganizationA. Levels of Biological Organization1. The cell, composed of "biological molecules," is the basic unitof life.2. Multicelled organisms have increasingly complex levels oforganization that result in tissues >>> organs >>> organ systems>>> organisms >>> populations >>> communities >>>ecosystems >>> biosphere.B. Interdependencies Among Organisms1. Energy flows from the sun.a. Plants (producers) trap this energy by photosynthesis.b. Animals (consumers) feed on the stored energy in plants, usingaerobic respiration.c. Bacteria and fungi (decomposers) break down the biologicalmolecules of other organisms in order to recycle raw materials.2. All orga

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