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24 Cards in this Set

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Biology
science of life
cell
smallest unit that can perform all life processes
reproduction
the process by which organisms make mor eof their own kind
metabolism
sum of all chemical processes occuring in an organism
homeostasis
the maintanance of stable internal conditions in spite of changes in the external environment
gene
section of a chromosome that codes for a protien or RNA molecule
heredity
transmission of genetic traits from parent to offspring
mutation
change in the DNA of a gene or chromosome
species
group of organisims that look alike and are capable of producing fertile offspring in nature
natural selection
process by which populations change in response to their environment as indivduals better adapred to the environment leave more offspring than individuals not suited to the environment
ecology
the study of the interactions of living organismims with one another and with their environment
HIV
human immunodeficiency virus; the infections virus that causes AIDS
cancer
a disease characterized by abnormal cell growth
cystic fibrosis
fatal genetic disorder in which excessive amounts of mucus are secreted, blocking intestinal and bronchial ducts and causing dificulty in breathing
observation
the act of noting or percieving objects or events using the senses
hypothesis
a proposed explanation for an observation that can be tested by observations or experimentation
prediction
the expected outcome if a hypothesis is correct
pH
measure of the acidity of a solution, representing the hydrogen ion concentration
experiment
a planned procedure to test a hypothesis
control group
a group in an expirament that does not recieve experimental treatment
independant variable
factor that is varied in an expirament
dependant variable
variable that is measure in an experiment
theory
explanation based on a set of related hypothesis that have been tested and confirmed many times
evolution
change in the gentic makeup of a population or species over time