Which one of the following features is not related to the shape of age pyramids of human population?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → Disruptive
An age pyramid is a plot of the age distribution of a population, with males and females shown in a diagram. Its shape shows the growth status of the population, which is growing, stable or declining.
(1) Stable — A shape of age pyramid. The young, middle-aged and old groups are about equal in size, so the population stays steady.
(2) Declining — A shape of age pyramid. The young group is smaller than the older groups, so the population is shrinking.
(3) Disruptive — Not a shape of age pyramid. This word belongs to natural selection, where more individuals take the two extreme values of a trait.
(4) Expanding — A shape of age pyramid. This is the growing population, with a broad base of young individuals.
NCERT Extract:
Population Attributes – …
Figure 11.1 Representation of age pyramids for human population