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BSC 1005 Ch. 2 Part 1

by: Cristina Rodriguez

BSC 1005 Ch. 2 Part 1 BSC 1005

Marketplace > Florida Atlantic University > BSC 1005 > BSC 1005 Ch 2 Part 1
Cristina Rodriguez

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BSC 1005 Ch. 2 Part 1
Lab-BIOL 1005-010
Diane Lowell
Class Notes
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This 3 page Class Notes was uploaded by Cristina Rodriguez on Saturday September 10, 2016. The Class Notes belongs to BSC 1005 at Florida Atlantic University taught by Diane Lowell in Fall 2016. Since its upload, it has received 235 views.


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Date Created: 09/10/16
Chapter 1 Definitions Review Sample Size – the number of experimental subjects or the number of times an experiment is  repeated Scientific Theory – a scientific explanation that is supported by a lot of evidence, over a long  time, by many researchers and has never been disproved (ex. Cell theory) Epidemiology – the study of patterns of disease in populations Correlation – a consistent relationship or link between variable Randomized clinical trial – randomly chosen subjects used in control and experimental groups  to test an independent variable Review  The bigger the sample size, the more likely that results will have statistical significance  and are not due to chance  The more experiments that support a hypothesis, the more confident we can be that it is  true  Advantages over controlled lab experiments ­ Less expensive ­ Can investigate harmful factors ­ Have bigger sample sizes ­ Can be studied over a long time  Epidemiological studies answer questions that could not be tested through controlled  laboratory experiments for ethical or practical reasons  Correlation does not mean causation  Clinical trials are only done at the end of the road of a scientific study and can only  happen with the patient’s approval  Chapter 2 Definition Biology – Scientific study of life Growth – the process of increasing in size Reproduction – the process of producing new organisms Homeostasis – the maintenance of a relatively constant internal environment Respond to stimuli – the process of reacting to their environment Metabolism – the breaking down of energy through a series of chemical reactions  Matter ­ anything that takes up space and has mass Elements – substances that cannot be chemically broken down Atom – the smallest unit of an element that still retains the property of that element  Nucleus – the dense core of an atom Electrons – negatively charged Protons – positively charged Neutrons – no charge (NEUTRAL) Ion – charged atom that has gained or lost an electron Atomic Number – number of protons  Mass Number – number of proton and neutrons Covalent Bond – a strong chemical linkage between two atoms based on the sharing of  electrons Noncovalent Bonds – bond that link molecules together but are weaker than covalent  bonds Hydrogen Bonds – a bond between partial charges Ionic Bonds ­  a bond that forms between ions Molecule – smallest unit of a chemical compound Chemical Compounds – association of atoms of different chemical elements Organic Molecules – molecules that has a carbon­based backbone and at least one C­H  bond Inorganic Molecules – molecules that lack the carbon­based backbone and C­H bonds Important Information  All living things have 5 traits in common ­ Growth ­ Reproduction ­ Homeostasis ­ Respond to stimuli ­ Use energy  Single­cell organisms produce two genetically identical cells  Multicellular organisms ­ Variety of ways ­ Seeds, eggs and sperm, etc.  Genetic material ­ Passed from parents to offspring  Organisms use energy to grow and develop  Some use energy from the sun while others get energy from other living organisms  The atom is the smallest unit that has all of its properties of its element  Atoms have distinct chemical properties determined by the number of subatomic particles  Protons and neutrons are contained in the nucleus  Electrons orbit the nucleus  On the periodic table each element is placed in order by it atomic number  The number of protons determines the element’s properties  Electrons are held in shells  Atoms are stable when their shells are filled so they sometimes share electrons to fill their shells  Carbon is the fourth most common element in the universe, but the second most common  element in the human body  6 elements that make up the human body ­ Oxygen ­ Carbon ­ Hydrogen ­ Nitrogen ­ Calcium ­ Phosphorus ­ Sulfur  Carbon forms four covalent bonds and it is a key component of the molecules of living  organisms  Carbon can either have 4 bonds (C6H12O6) or 2 double bonds (CO2)  Carbon­ based molecules can be very long


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