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Dewey Exam 1 - UNT

Emergent Properties Traits that a system contains, but individual parts do not
Reductionism Breaking a system apart and studying it's individual parts
Systems Bio Studying a system by modeling how parts interact
Transformation of energy: Always comes in as light and leaves as heat
Form meets function Structure and function are closely related
Cell Smallest thing that can be called "alive"
Membrane Encloses cells
DNA Uses this as genetic info, blueprint of life
Colonies Groups of cells
DNA carries: Carries information that determines on organism
Regulation of Bio-Systems Feedback Loops/mechanisms
Negative feedback Product up process down; ATP production; Super common
Positive Feedback Product up process up; Already making, but needs more; EX: Blood cotting;
Industrial Melanism Phenomenon in which darker individuals predominate over lighter ones
Taxonomy Organisms are classified based on similarities
Nested hierarchy Grouping of organisms from most generic to most specific
3 Domains of life 1. Bacteria 2. Archaea 3. Eurkarya
Eukarya Domain consisting of protists, fungi, animalia, plantae
Process of Science (1-4) 1. Observation leads to question 2. Leads to Hypothesis 3. Leads to experiment 4. Leads to conclusion that supports or denies hypothesis
Iterative Hypothesis Hypothesis can be changed and revised throughout the experiment
How many variables are tested each experiment? Only 1 variable
Dependent Variable What investigator measures in experiments
Independent Variable What is changed in the experiment
Deductive reasoning Reasoning that uses general principles to make predictions
Inductive reasoning Reasoning that uses observations to develop general conclusions
Matter Anything that takes space and has mass
Nucleus Charge Always positive
Measurement weight of 1 atom 1 Dalton
Atomic Number means # of what in an atom? Number of Protons in an Atom
Mass Number means # of what in an atom? Sum of Protons and Neutrons
Isotope Different atomic forms of a single element with varying numbers of Nuetrons
Radioactive Isotopes Nucleus decays spontaneously giving off particles and energy
4 Elements that make 96.3% of Human Weight Oxygen, Carbon, Hydrogen, Nitrogen
Strong bonds: Ionic, Covalent
Cation: Positively charged atom
Anion: Negatively charged atom
Non-polar covalent bonds Equal sharing of electrons
Polar covalent bonds Unequal sharing of electrons
Hydrogen bonds weak bonds that hold two or more polar covalent compounds together
Van Der Walls -Weak forces that hold non-polar covalent compounds - Result from asymmetric distribution of electrons in their outer shell
Created by: bpiatek91



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