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प्रश्न
List any four characters that are employed in human population census.
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उत्तर
- Birthrates
- Death rates
- Sex ratio
- Age distribution
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संबंधित प्रश्न
(a) Name the two growth models that represent population growth and draw the respective growth curves they represent.
(b) State the basics for the difference in the shape of these curves
(c) Which one of the curves represents the human population growth at present? Do you think such a curve is sustainable? Give reason in support of your answer.
"Analysis of age-pyramids for human population can provide important inputs for long-term planning strategies." Explain.
List the attributes that populations but not individuals possess.
If a population growing exponentially double in size in 3 years, what is the intrinsic rate of increase (r) of the population?
Answer the following question.
What is "population" according to you as a biology student?
Study the flow chart given below and complete the equation that follows by identifying 1, 2, 3 and 4.
Nt + 1 = Nt + {(1+ 2) − (3 + 4)}
Mention the different ways by which the population density of different species can be measured.
Give an account of population regulation.
The phenomenal and rapid increase of population in a short period is called ______.
Which of the following would necessarily decrease the density of a population in a given habitat?
Which one of the following organisms reproduces sexually only once in its lifetime?
The density of a population in a habitat per unit area is measured in different units. Write the unit of measurement against the following:
Banyan
Label the three tiers 1, 2, 3 given in the above age pyramid.
Draw an age pyramid for the ‘zero population growth rate’.
Given below is the Age Pyramid of the population in one of the states in India as per 2011 census. It depicts the male population on the left-hand side, female population on the right-hand side, newborns towards the base and gradually increasing age groups as we move from base to the top, with the oldest population at the top. Study this pyramid and comment upon the appropriateness of the Assertion and the Reason.
Percentage to the total population
Assertion: It is a stable population.
Reason: The pre-reproductive and reproductive individuals are almost in equal numbers and the post-reproductive individuals are relatively fewer.
Important attributes belonging to a population but not to an individual are:
- Birth rate and death rate
- Male and female
- Birth and death
- Sex-ratio
Select the correct option from the given options:
With the help of neatly labelled diagrams, explain the different types of age pyramids of human population.
