why is the presence of villi and microvilli is crucial to the functioning of the digestive system? i.e the small intestine.
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Answer:
The graphical representation of the age structure is known as age pyramid (option D).
Explanation:
The age pyramid or more properly called population pyramid groups all the individuals of a population, distributing them by age and sex. The name is due to the fact that, in general, the bar graph resembles a pyramid.
The age groups are distributed in the pyramid by age from lowest (bottom) to highest (top), with the sexes forming the sides of the pyramid.
In emerging countries the population is relatively young, which makes the base of the pyramid wide, narrowing as it moves up to the upper age groups.
<u><em>Age group</em></u><em>, </em><u><em>age graph</em></u><em> or </em><u><em>age scale</em></u><em> do not correspond to the population graph where the age and sex structure of a population are expressed.</em>
