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प्रश्न
Study the graph given below and answer the questions that follow :
(i) Write the status of food and space in the curves (a) and (b).
(ii) In the absence of predators, which one of the two curves would appropriately depict the prey population?
(iii) Time has been shown on X-axis and there is a parallel dotted line above it. Give the significance of this dotted line
उत्तर
(i) There is ample food and space for the population depicted by curve (a). When the resources are unlimited, the curve is exponential. There are limiting food and space for the population depicted by curve (b). When the resources are limiting, the curve becomes sigmoid.
(ii) In the absence of predators, curve (a) would appropriately depict the prey population.
(iii) The dotted line represents the carrying capacity of the environment. The carrying capacity represents the size of population that the environment can hold by providing necessary resources. When a population reaches this line its population size is stabilised by various environmental factors.
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संबंधित प्रश्न
Construct an age pyramid which reflects a stable growth status of human population.
Represent diagrammatically three kinds of age-pyramids for human populations.
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.
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)}
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
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.
Write the best method to measure the population density of a single Banyan tree in comparison to Partlzenium weeds in a forest by an ecologist. Explain and justify your answer.
