Examlex
How many biosphere reserves have been established worldwide?
Heterosexual Contact
Sexual interactions between individuals of the opposite sex.
Leading Source
The most important or prominent origin or provider of information or materials in a particular context.
HIV Infection
An infectious disease triggered by the human immunodeficiency virus that targets the immune system, potentially resulting in acquired immunodeficiency syndrome (AIDS).
Prevent Transmission
Measures taken to stop the spread of diseases from one person to another or among a population.
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Q107: Which statement is likely to be made