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40 Cards in this Set

  • Front
  • Back
Inference
the act or process of deriving logical conclusion from permises known or assumed to be true
Data
observations and measurements made during an experiment
Observation
the act of noting and recording something, such as a phenomenon, with instruments
Hypothesis
suggested explaination to a problem or observation based upon known information
Theory
hypothesis that has been tested and supported by a great amount of edvidence over time
Independant variable
the factor that scientists change
Dependant variable
the observation to see how it repsonses to the change made by the independant variable
Controlled experiment
part within the experiment that is maintained without change in order to provide a conclusion of the experiment containing the variable
Assumption
something taken for granted or accepted as true without proof; a supposition
Scientific Law
a state of describing (but not explaining) a natural event or phenomenon
Atom
basic unit of matter
Element
substance consisting entirely of one type of atom
Compound
substance formed by the chemical combination of two or more element in definite proportions
Amino Acid
compound with an amino group (-NH2) on one end and a carboxyl group (-COOH) on the other end
Protien
macromole that contains carbon, hydrogen, oxygen, and nitrogen; needed by the body for growth and repair and to make up enzymes
Simple Sugar
singlar sugar molecule
Carbohydrate
compound made up carbon, hyrdrogen and oxygen atoms; major sources of energy for the human body
Monomer
small unit that can join together with other small unit to form polymers
Polymer
large compound formed from combinations of many monomer
Lipid
macromolecule made mainly from carbon and hyrogen atoms; includes fats, oils, and waxes
Prokaryote
an organism whose genetic material (DNA) is not enclosed by membranes to form a nucleus but lies free in the cytoplasm
Eukaryote
an organism whose genetic material (DNA) is enclosed by membranes (nuclear envelope) to form a nucleus
Cell Wall
A rigid wall surrounding the cells of bacteria and plants. They are made up of cellulose fibers.
Cell
the basic unit of structure of all living organisms
Cell Theory
the theory that all organisms are composed of cells and cell products and that growth and development results from divison and differentiation of cells
Cell Membrane
thin, flexible barrier around a cell; regulates what enters and leaves the cell
Organelle
specialized structure that performs important cellular functions within a eukaryotic cell
Cytoplasm
material inside the cell membrane but not including the nucleus
Nucleus
small, dense region within most nuclei in which the assembly of ribosomes begins
Bacteria
domain of unicellular prokaryotes that have cell walls containing peptidoglyeans
Concentration
the mass of solute in a given volume of solution, or mass/volume
Diffusion
process by which moleclues tend to move from an area where they are more concentrated to an area where they are less concentrated
Selective Permebility
property of biological membranes that allows only certain substances to pass through them
Osmosis
diffusion of water through a selectively permeabile membrane
Facilitated Diffusion
movement of specific molecules across cell membranes through protein channels
Active Transport
energy requring process that moves material acriss a cell membrane against a concentration difference
Endocytosis
process by which a cell taken material into the cell by infolding of the cell membrane
Phagocytosis
process in which extensions of cytoplasm surround and engulf large particles and take them into the cell
Exocytosis
process by which a cell releases large amounts of materials
Cell Specialization
separate roles for each type of cell in multicelluar organism