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Ch. 1 Terms

Biology

TermDefinition
biosphere all organisms and the part of the earth where they exist
biodiversity variety of life within an area
species group of organisms so similar to one another that they can breed and produce fertile offspring
biology scientific study of all life forms
organism an individual living thing
cell basic unit of life
metabolism all chemical processes that synthesize or break down materials within an organism
DNA (deoxyribonucleic acid) molecule that stores genetic information in all organisms
system changing, organized group of related parts that interact to form a whole
ecosystem collection of organisms and nonliving things, such as climate, soil, water, and rocks, in an area
science knowledge obtained by observing natural events and conditions in order to discover facts and formulate laws and principles that can be verifies or tested
homeostasis maintenance of constant internal conditions in an organism
evolution change in living things over time
adaptation an inherited trait that gives an advantage to individual organisms and is passed on to future generations
observation using our senses to study the world
data observations that can be analyzed
hypothesis proposed answer for a scientific question
experiment process that tests a hypothesis by collecting information under controlled experiments
independent variable a condition that is manipulated or changed by a scientist
dependent variable experimental data collected through observation and measurement
constant the conditions that do not change during an experiment
theory a proposed explanation for a wide range of observations and experimental results that is supported by a wide range of evidence
measurement the determination of the dimensions of something using a standard unit
accuracy a description of how close a measurement is to the true value of the quantity measured
precision exactness of a measurement
microscope enlarges an image of an object
gene a segment of DNA that stores genetic information
molecular genetics study an manipulation of DNA on a molecular level
genomics study and comparison of genomes both within and across species
biotechnology the use of and application of livings things and biological processes
transgenic organisms that have genes for more than one species, or have altered copies of their own genes
Created by: EliseD