Examlex
Which of the following does not have a true coelom?
United States
A federal republic consisting of 50 states, a federal district, and several territories, known for being the world's third-largest country by total area.
Demography
The statistical study of populations, including their size, distribution, and trends, as well as the factors influencing these elements.
Social Composition
The structure and demographic makeup of a society or social group, including aspects like age, gender, income level, and ethnicity.
Fertility Rates
The average number of children born to a woman over her lifetime within a specific population.
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