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24 Cards in this Set

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Biology
science of life
Cell
smallest unit that can perform all the life processes
Evolution
change in the genetic makeup of a population or species over time
Ecology
the study of living organisms with one another and with their environment
Gene
section of a chromosome that codes for a protein or RNA molecule
Heredity
transmission of genetic traits from parent to offspring
Homeostasis
the maintenance of stableinternal conditions in spite of changes in the external environment
Mutation
change in the DNA of a gene or chromosome
Metabolism
sum of all chemical processes occuring in an organism
Natural Selection
process by which populations change in response to their environment as individuals better adapted to the environment leave more offspring thanthose individuals not suited to the environment
Reproduction
the process by which organisms make more of their own kind
Species
group of organisms that look alike and are capable of producing fertile offspring in nature
HIV
human immunodeficiency virus; infectious virus that causes AIDS
Cancer
a disease characterized by abnormal growth
Cystic Fibrosis
fatal genetic disorder in which excessive amounts of mucus are secreted, blocking intestinal and bronchinal ducts and causing difficulty in breathing
control group
a group in an experiment that does not receieve experimental treatment
dependent variable
variable that is measured in an experiment
Experiment
a planned procedure to test a hypothesis
Hypothesis
a proposed explanation for an observation that can be tested by additional observations or experimentation
independent variable
factor that is varied in an experiment
Observation
the act of nothing or perceiving objects or events using the senses
pH
measure of the acidity of a solution, representing the hydrogen ion concentration
Prediction
the expected outcome if a hypothesis is correct
Theory
explanation based on a set of related hypotheses that have been tested and confirmed many times