_____ Was One of the Most Significant Changes of the 20ᵗʰ

question 19

Multiple Choice

_____ was one of the most significant changes of the 20ᵗʰ century.

• A) Population growth
• B) Population decline
• C) Migration increases
• D) Fertility declines
• E) Mortality declines

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Definitions:

R-OH

This is a general formula representing alcohols where R represents the alkyl group and -OH represents the hydroxyl functional group.

Alcohol

Any organic compound where the hydroxyl functional group (–OH) is bound to a carbon atom.

Aldehydes

Organic compounds characterized by the functional group -CHO, where the carbon atom is double bonded to oxygen and single bonded to hydrogen.

Functional Group

A specific grouping of atoms within a molecule that has a characteristic chemical behavior and properties.