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Biology 160 Week 1, Class 1 Notes

by: Meredith Buller

Biology 160 Week 1, Class 1 Notes bisc 160

Marketplace > University of Mississippi > bisc 160 > Biology 160 Week 1 Class 1 Notes
Meredith Buller
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These notes are from week 1 of the semester.
Biological Sciences I
Class Notes




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This 3 page Class Notes was uploaded by Meredith Buller on Tuesday August 30, 2016. The Class Notes belongs to bisc 160 at University of Mississippi taught by SYMULA, REBECCA E in Fall 2016. Since its upload, it has received 7 views.

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Date Created: 08/30/16
Bio 8/22 - Week 1 Ch. 1 What makes a cell? - reproduce, cellular respirate, growth, homeostasis, use/transfer energy, cells, responds to environment, evolution, same elements, genetic information, biology is the study of living things amino acids made of protein, breaks down to carbon oxygen phosphorus, we are made of cells, breathing is exchanging environmental elements, common components: carbohydrates, fatty acids, nucleic and amino acids consists of cells extract energy contain genetic info and reproduce with it mutations evolve and make it easier to survive and reproduce all living things is the study of biodiversity -how many species, how big are populations, studying what is the same, how we do experiments -observation -qualitative or quantification -poison frogs produce compounds that cause paralysis in vertebrates -poison frogs are vertebrates scientific method observations, questions, hypothesis, predictions goal is to falsify null hypothesis some principles apply to all living things all living things consist of cells Cells are the basic unit of all living things One cell is an organism, also part of a multicellular organism. Cells carry their own metabolic processes Cell Theory Chemical composition Water based Genetic material copied, passed Cells come from pre-existing cells Cell theory is an explanation based upon several test, observations and facts. All life shares a common evolutionary history Phylogeny illustrates relationships. Common ancestry Shared features All things share features, but have differences and unique characteristics Natural selection generated some key adaptations. Chemical evolution Cellular structure of the common ancestor. Photosynthesis was critical Compartmentalization (endosymbiosis multicellularity) Fossil Record Mutation is change, natural selection determines which are common Living things interact with each other and the environment Communities are interactions between different species Populations are within one single species Cell-cell communication - cells must communicate in order to keep organism living Properties of molecules influence living things Molecules are made up of atoms Molecules vary in size Molecules have three dimensional shape Enzymes break up starch for food Shape of a molecule determines the function of the molecule Molecules have specific chemical properties Atoms have a general structure -small -have a nucleus -include protons and neutrons -electrons orbit around the nucleus of the atom -atoms are neutral and have atomic mass -1 dalton = the weight of a proton Elements are composed of the same atom. What an atom is is determined by the number of protons Sodium is essential for your nerves to function H, C, N, O, P, S - know these elements!!!!! figure in book, chemical symbol and atomic number Elements differ by the number of protons mass number is the sum of protons and neutrons (in daltons) Isotopes have different numbers of neutrons but are all the same element People who live by the ocean have more of a heavy oxygen level than those who live in mountains. Radioisotopes are unstable isotopes that lose part son the atom. - it is unstable Radiation: alpha (He nucleus), beta (electron), gamma (rays) We can use decay to measure and detect Electrons are organized around the nucleus -shells contain orbitals -most shells contain 8 electrons -orbitals can hold pro 2 electrons -electrons go around the nucleus -orbitals are organized into s & p orbitals -each orbital can contain 2 electrons - filled electrons are filled at 8 - The Bohr Model is a simplification of electrons organization - Electron pairs occupy the same orbital


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