GGRC02H3 Quiz: In-Class Assignment Study Guide
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In earlier ages, you only have three strata: infancy, adulthood, and old age: however nowadays, it is more stratified (7 strata) infancy, childhood, adolescence, young adulthood, middle age, young old, and old old. In earlier ages, they had more time to acquire this knowledge. How to interpret this diagram: what you can see here are three sex ratios for three countries: ghana, usa, and. If we assume humankind acted in the last thousands of years, then males want to find females and females want to find men, if there are suddenly more men, then this is more difficult for females. If less women, can bear less children given the fertility rate is the same: can allow for immigration so that surplus men can find partners from outside of the country. Population pyramids 1994: demographic transition = decline in mortality rates followed by decline in fertility rates.
