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प्रश्न
Comment on the following figures: 1, 2 and 3:
A, B, C. D, G, P, Q, R, S are species
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उत्तर
Fig. 1: It is a single population and all individuals are of the same species, i.e. A - Individual interact among themselves and their environment.
Fig. 2: It is a community and it contains three populations of species A, B and C. They interact with each other and their environment.
Fig. 3: It is a biome. It contains three communities of which one is in climax and other two are in different stages of development. All three communities are in the same environment and they interact with each other and their environment.
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संबंधित 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
Represent diagrammatically three kinds of age-pyramids for human populations.
"Analysis of age-pyramids for human population can provide important inputs for long-term planning strategies." Explain.
What is an age-pyramid?
What is reproductive fitness? Explain it with the help of an example.
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.
Animals that can move from fresh water to sea called as ________.
Measures of ‘Central tendency’ refer to:
Nutrient enrichment of water body result.
`"dN"/"dt" = "rN" (("K"- "N")/"K")` in logistic growth "K" represents:
Age distribution in a population can influence
Which of the following would necessarily decrease the density of a population in a given habitat?
Label the three tiers 1, 2, 3 given in the above age pyramid.
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.
What would be the best method to measure the total population density of a dense bacterial culture in a petridish and why?
Identify the type of pyramid given above. Write the identifying feature on the basis of which you identified it.
