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प्रश्न
Identify the type of pyramid given above. Write the identifying feature on the basis of which you identified it.
Identify the type of pyramid given below and write two identifying features of such a pyramid:
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उत्तर
It shows the age pyramid for the expanding human population.
Identifying features:
- There are many more pre-reproductive and reproductive age groups in these kinds of pyramids.
- Compared to pre-reproductive and reproductive age groups, the post-reproductive age group population is minuscule.
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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.
Answer the following question.
What is "population" according to you as a biology student?
Measures of ‘Central tendency’ refer to:
What parameters are used for tiger census in our country’s national parks and sanctuaries?
Which one of the following organisms reproduces sexually only once in its lifetime?
An individual and a population has certain characteristics. Name these attributes with definitions.
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.
What would be the best method to measure the total population density of a dense bacterial culture in a petridish and why?
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:
The number of lily plants in a pond was found to be 50. After one year, the number. increased to 65. Calculate the natality of lily plants.
