Colligative properties are those properties of solutions that depend on the number of dissolved particles in solution, but not on the identities of the solutes. For example, the freezing point of salt water is lower than that of pure water, due to the presence of the salt dissolved in the water.
Shares & Saves. Save. DNA testing evolved from the study of genetics, which began in the late 1800s when Gregor Mendel first studied the phenomenon of inherited traits in pea plants. His work laid the foundation for the discovery of DNA, or deoxyribonucleic acid, the molecules that contain our genetic makeup.
Many parents are confused about IQ testing. The initials IQ stand for Intelligence Quotient. The term came from tests that were initially created in 1905 by Alfred Binet for the purpose of determining whether children were sufficiently intelligent to benefit from schooling. Binet devised a series of tests for each year of child development to calculate children's mental ages compared to their chrono-logical ages.