Biology Quiz-1
Terms
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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