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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
reproduction
the process by which organisms make more of their own kind
metabolism
sum of all chemical processes occurring in an organism
homeostasis
the maintenance of stable internal conditions in spite of changes in the external environment
gene
section of a chromosome that codes for a protein of RNA molecule
hereditary
transmission of genetic traits from parent to offspring
mutation
change in DNA of a gene or chromosome
evolution
change in the genetic makeup of a population or species over time
species
group of organisms 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 individuals better adapted to the environment leave more offspring than those individuals not suited to the environment
ecology
the study of the interactions of living organisms with one another and with their environment
HIV
human immunodeficiency virus; the infectious 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 difficulty in breathing
observation
the act of noting or perceiving objects or events using the senses
hypothesis
a proposed explanation for an observation that can be tested by additional 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 experiment that does not receive experimental treatment
independant variable
factor that is varied in an experiment
dependant varible
variable that is measured in an experiment
theory
explanation based on a set of related hypothesis and have been tested and confirmed many times