21 terms

Miller and Levine Biology Chapter 1

an organized way of studying the natural world
the act of noticing and describing events or processes in a careful, orderly way
logical interpretation based on what scientists already know
a scientific explanation for a set of observations that can be tested in ways that support or reject it
controlled experiment
experiment in which only one variable is changed
independent variable
variable that is deliberately changed
dependent variable
variable that is observed and changes in response to the independent variable
control group
exposed to the same conditions as the experimental group except for one independent variable
detailed records of experimental observations
ties hypotheses together, unifies a broad range of observations and hypotheses
particular preference or point of view that is personal
study of life
deoxyribonucleic acid; complex information needed to grow, live and reproduce
signal to which an organism responds
asexual reproduction
single organism produces offspring identical to itself
scientific method
observing, ask questions, make inferences, form hypothesis conduct an experiment , collect/analyze data, draw conclusions
characteristics of living things
made up of cells, based on DNA, obtain and use materials and energy, grow and develop, reproduce, respond to their environment, maintain a stable internal environment, change over time
produces magnified images that are too small to see with an unaided eye
electron microscope
this tool uses a beam of electrons to see small objects
cell culture
a group of reproducing cells often in a petri dish
cell fractionation
cells broken apart and separated by a centrifuge

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