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.
(i) Curve a represents exponential growth which shows that there is ample food and space for the population. Resources are unlimited.
Curve b represents logistic growth and shows that there is limiting food and space for the population. The resources are limiting.
(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 stabilized by various environmental factors.
Long Answer Type'Analysis of age-pyramids for human population can provide important inputs for long-term planning strategies.' Explain.
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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