Characteristics of Living Things
Terms
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- The change in the genetic makeup of a population or species over time
- Evolution
- The act of noting or perceiving objects or events using the senses
- observation
- A variable that is changed in an experiment
- independent variable
- The study of living organisms or the science of life
- Biology
- A disease characterized by abnormal cell growth
- Cancer
- A group of organisms that look alike and are capable of producing fertile offspring in nature.
- species
- The study of the interactions of living organisms with one another and with their environment
- Ecology
- The smallest unit that can perform all the life processes
- cell
- A proposed explanation for an observation that can be tested by additional observations or experimentation
- hypothesis
- The process by which organisms make more of their own kind
- Reproduction
- The expected outcome if a hypothesis is correct
- prediction
- A 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.
- natural selection
- The measure of the acidity of a solution, representing the hydrogen ion concentration.
- PH
- The sum of all chemical processes occurring in an organism
- metabolism
- A variable that is measured in an experiment.
- dependent variable
- The maintenance of stable internal conditions in spite of changes in the external environment
- homeostasis
- A planned procedure to test a hypothesis
- experiment
- Section of a chromosome that codes for a protein or RNA molecule
- Gene
- A group in an experiment that does not receive experimental treatment
- control group
- The transmission of genetic traits from parent to offspring
- heredity
- Human immunodeficiency virus
- HIV
- Change in the DNA of a gene or chromosome
- Mutation
- An explanation based on a set of related hypotheses that have been tested and confirmed many times
- theory
- A fatal genetic disorder in which excessive amounts of mucus are secreted, blocking intestinal and bronchial ducts and causing difficulty in breathing.
- cystic fibrosis