Examlex
Approximately how many half-life periods must elapse if the activity of a radioactive isotope sample is to be reduced to 0.03 of the original value?
Semantics
An aspect of a language that children must learn, including the words and word parts that express meanings in that language, also called the meaning system of a language.
Autistic Spectrum Disorders
A range of neurological conditions characterized by challenges with social skills, repetitive behaviors, speech, and nonverbal communication.
Genetic Factors
Elements within an organism's DNA that contribute to its physical traits, behavioral tendencies, and susceptibility to diseases.
Epidemiological Research
The study of the distribution and determinants of health-related states or events in specified populations, and the application of this study to control health problems.
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