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The Study of Life

by: keaffaber.3

The Study of Life BIO 1120-01


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About this Document

The First week of lecture notes from Professor Krane
Cells and Genes
Professor Dan E. Krane
Class Notes
25 ?




Popular in Cells and Genes

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This 4 page Class Notes was uploaded by keaffaber.3 on Monday September 12, 2016. The Class Notes belongs to BIO 1120-01 at Wright State University taught by Professor Dan E. Krane in Fall 2016. Since its upload, it has received 356 views. For similar materials see Cells and Genes in Biology at Wright State University.


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Date Created: 09/12/16
The Study of Life 08-30-2016 Professor Krane IF HE HAS NOT TALKED ABOUT IT IN A LECTURE, IT WILL NOT BE ON THE TESTS!!!! LOOK AT THE OLD EXAMS!!  Get lab goggles  DON’T HAVE TO BRING THE TEXTBOOK TO CLASS!!!!  Exam questions are based off concepts and understanding how things work  Check out the old exams  Read experiment before going to the lab Basic Characteristics of life o What does it mean to be alive? o What do I look for to tell if something is alive? o What is the difference between alive and not alive? o At least 4 criteria must be met for us to even begin considering something to be alive o Organization  Living things tend to be more ordered than their surroundings  Organization extends through levels from sub-cellular organelles, to cells to whole organism and populations o Ability to reproduce  Living things as a rule can give rise to relatively similar copies of themselves. o Respond to stimuli o Repair damage  Most living things can repair damage done to them if it is not too severe and become as they were before  Iron bar and rocks cannot but stars can. o Life is a broad continuum and the boundaries between living and non-living things are indistinct at best. Reductionism vs. holism o Reductionists look at things at the finest, smallest possible details o Holists look at the whole picture, like the ecosystem and how everything works together o This class is on the reductionism side and remember everything is connected o Fundamentally important interactions between all levels and everything can be thought of in bigger and smaller frames of reference Fundamental Chemistry DNA is the genetic material  Bridge the gap between molecule and cells with DNA  One molecule and the chemistry associated with it is almost solely responsible for storing the information that is needed to maintain the organization of cells  Everything is deeply interconnected Diversity and inter-relatedness  Building blocks from which living things are made  Become exposed to underlying inter-relatedness that permeates all the diversity we see in living things  Inter-relatedness is best explained scientifically by and evolutionary perspective Underlying unity at lower levels  We all share a common ancestor  We find that all living things available to us for study do fundamentally important tasks in much the same way  Highly unlikely that these commonalties would have arisen by chance Evolution- a central theme  We all share a common ancestor  All living things share many complex structural, strategic and chemical features because they once all shared a common ancestor that possessed those very same traits  We see change because we have accumulated them over the years  Without evolution we would still be cavemen  There is variation between members within species  Many more organisms are produced than the environment can support  Competition for essential resources takes place  Survivors live to reproduce and pass on their advantages to their offspring o The realm of science  What does it mean to be scientific? o Natural vs. supernatural phenomena o The scientific method Study questions for this material: What are the basic characteristics that qualify something as living? Members of the three broad kingdoms of life appear to be radically different from each other. What one thing do they all share in common? Science is strictly limited to the study of natural phenomena (things that result as the outcome of natural laws like the speed of light). What is an example of an issue that scientific studies cannot address? Individual biologists typically focus on either the smallest molecules in living things or organisms as a whole. Which is more important? All living things on earth share many complex structural, strategic and chemical features. What accounts for these fundamentally important similarities despite all their obvious differences? Biology is the study of life. Still, much of a biology course pertains to processes that take place in non-living things. Why is that the case?


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