Biology: the study of life
Cells: the smallest unit cappable of all life function
Reproduction: the process by which organisms make more of their own kind
Metabolism: the sum of all of the chemical reactions carried out in an organism
Homeostatsis: the maintance of stable internal conditions in spite of changes in the external environment
Genes: sets of inherited instructions for making protein
heredity: the passing of traits from parent to offspring
Mutation: a change in DNA of a gene
Evolution: change in the inherited traits of species over time
Species: a group of genetically similar organisms that can produce fertile offspring
Natural Selection: the essence of biology, providing a consistent explanation for life's diversity
Ecology: the science that sudies the interactions of living organisms with one antoher and with the nonliving part of their environment
HIV: a virus that destroys the immune system, causing acquired immune deficiencey syndrome
Cancer: a growth disorder of cells that occurs when cells divide uncontrollably within the body
Observation: the act of noting or percieving objects or events using the senses
Hypothesis: an expanation that might be true- a statement that can be tested by additional observations or experimentation
Prediction: the expected outcome of a test assuming the hypothesis is correct
PH: a relative measure of the hydrogen ion concentration within a solution
Experiment: a planned procedure to test a hypothesis
Control group: a group in an experiment that recieves no experimental treatment
Independent variable: the factor that is varied in an experiment
dependent variable: the variable that is measured in an experiment
Theory: a set of related hypotheses that have been tested and confirmed many times by many scientists
