Short Answer Type
Long Answer Type
Multiple Choice QuestionsSelect the statement which explains best parasitism.
One organism is benefited.
Both the organisms are benefited.
One organism is benefited, other is not affected.
One organism is benefited, other is affected.
Short Answer TypeStudy 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.
Long Answer Type'Analysis of age-pyramids for human population can provide important inputs for long-term planning strategies.' Explain.
Analysis of age pyramids for human population can provide important inputs for long-term planning strategies. The different age groups present in a population determine its reproductive status. Distribution of age groups highly influences the growth of the population. Each population displays following three ecological ages or age groups:
1. Pre-reproductive
2. Reproductive
3. Post-reproductive
Population having large number of young members grows rapidly, while, the population having more number of post-reproductive members tends to be declining. There are basically three types of age pyramids they are as follows:
Therefore, through the thorough analysis of the age pyramids of a particular population, the distribution of resources can be done more efficiently. A better planning strategy can be adopted considering the demand of the resource; thus, long-term management of resources can be done in such a way that the population can derive maximum benefit with minimum effects on nature, leading the population to flourish efficiently.
Short Answer TypeWrite the equation that helps in deriving the net primary productivity of an ecosystem.
Explain mutualism with the help of any two examples. How is it different from commensalism?
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