Select the option that helps explain how the production of gametes through meiosis contributes to genetic variation in the offspring. Chromosomes are not replicated A during meiosis. More cells are formed as a result of cell division by meiosis. The number of chromosomes increases as a result of meiosis. Recombinant chromosomes are D produced as a result of meiosis.

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A: Sex determination in human being is done on the basis of XX/XY chromosomes.

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A: Molecules are of various types. They can be organic or inorganic.

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Environmental health and hazards

An organism's environment is the environment in which it lives and has an impact on its well-being. The World Health Organization (WHO) defines environmental health as "those aspects of public health, such as quality of life, that are influenced by physical, chemical, biological, social, and psychosocial components in the environment." Environmental health is concerned with both natural and man-made settings in order to enhance public health. Environmental science, occupational medicine, toxicology, and epidemiology are the key subdisciplines of environmental health.