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प्रश्न
List the attributes that populations but not individuals possess.
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उत्तर १
Some characteristics of a population differ from those of individual members. Individuals are born and die, whereas populations have birth and death rates. Each population has distinct characteristics, including age distribution, genetic composition, and growth models. A population has a sex ratio, although individuals might be male or female.
उत्तर २
A population possesses several attributes that individuals do not have. These include population density (number of individuals per unit area), biotic potential (reproductive capacity of the population), environmental resistance (factors limiting population growth like predators and resources), population growth (changes in population size over time), carrying capacity (maximum population size the environment can sustain), population growth curve (pattern of population increase), age distribution, sex ratio, population dispersal, and population bioenergetics. These attributes collectively describe the dynamics and characteristics of a group of organisms living in the same area, which an individual alone cannot exhibit.
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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.
Construct an age pyramid which reflects a stable growth status of human population.
How does an age pyramid for human population at given point of time helps the policy-makers in planning for future.
"Analysis of age-pyramids for human population can provide important inputs for long-term planning strategies." Explain.
Define the carrying capacity.
Measures of ‘Central tendency’ refer to:
Nutrient enrichment of water body result.
Population having large number of postreproductive and small number of prereproductive age group is called
Age distribution in a population can influence
Which of the following would necessarily decrease the density of a population in a given habitat?
The density of a population in a habitat per unit area is measured in different units. Write the unit of measurement against the following:
Bacteria
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
The density of a population in a habitat per unit area is measured in different units. Write the unit of measurement against the following:
Deer
What type of population growth is represented by the above age pyramid?
Draw an age pyramid for the ‘zero population growth rate’.
The following diagrams are the age pyramids of different populations. Comment on the status of these populations.
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.
