Countries with high population growth rates h | vedclass

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(A) In an age pyramid,a broad base indicates a high proportion of young individuals (pre-reproductive age),which signifies a rapidly growing populatio

Vedclass · Accepted Answer

$A$ is more modern and shows a slight reduction in the growth rate.

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(A) In an age pyramid,a broad base indicates a high proportion of young individuals (pre-reproductive age),which signifies a rapidly growing population. Pyramid $B$ has a very broad base compared to pyramid $A$,indicating that $B$ represents a population with a higher growth rate (an earlier stage of demographic transition). Pyramid $A$ has a relatively narrower base,indicating a reduction in the proportion of young individuals,which suggests that the population is moving towards a more stable or slower growth rate (a more modern stage). Therefore,$A$ represents a more modern population structure compared to $B$.

Column-$I$	Column-$II$
$(a)$ Diapause	$(i)$ Inactive stage during summer
$(b)$ Hibernation	$(ii)$ Inactive stage during winter
$(c)$ Dormancy	$(iii)$ Temporary suspension of development
$(d)$ Aestivation	$(iv)$ Reduced metabolic state during unfavorable conditions

Column-$I$	Column-$II$
$(a)$ Earthworm	$(i)$ Birth-rate
$(b)$ Succession	$(ii)$ Pioneer species
$(c)$ Population rise	$(iii)$ Pollination
$(d)$ Ecological services	$(iv)$ Saprotrophs

Countries with high population growth rates have taken measures to reduce them. The figure below shows the age pyramids of populations. Which of the following is a correct interpretation for their status after $20$ years?

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The figure given below is a diagrammatic representation of the response of organisms to abiotic factors. What do $a$,$b$,and $c$ represent respectively?

Which of the following is an omnivore?

Match the columns:

Column-$I$ Column-$II$

$(a)$ Earthworm $(i)$ Birth-rate

$(b)$ Succession $(ii)$ Pioneer species

$(c)$ Population rise $(iii)$ Pollination

$(d)$ Ecological services $(iv)$ Saprotrophs

What type of human population is represented by the given age pyramid?

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