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प्रश्न
While living in and on the host species, the animal parasite has evolved certain adaptations. Describe these adaptations with examples.
उत्तर
In accordance with their lifestyles, parasites evolved special adaptations such as the loss of unnecessary sense organs, presence of adhesive organs or suckers to cling on to the host, loss of digestive system and high reproductive capacity. The life cycles of parasites are often complex, involving one or two intermediate hosts or vectors to facilitate the parasitisation of their primary host.
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संबंधित प्रश्न
Define the following term:
Interspecific competition
Answer the following question.
Mention the term used to describe a population interaction between an orchid growing on a forest tree.
The number of deaths under ideal conditions is known as ______.
Which principle/theory states that 'Two closely related species competing for the same resources cannot co-exist indefinitely and the competitively inferior will be eliminated eventually.'?
Which one of the following is NOT an example of commensalism?
Mycorrhizae are the example of ______.
______ in birds is an interesting example of parasitism in which the parasitic bird lays its eggs in the nest of its host and the host incubates them.
Observe the graph given below.
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The graph represents inter-specific interaction between two species of Paramecia competing for the same resource in a culture medium. Paramecium caudatum and Paramecium aurelia were grown in separate cultures as well as in mixed cultures. It was found that each species grew in numbers according to the logistic equation.
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a) Which species is competitively superior? Support it with the data provided in the graph.
b) State the underlying principle for the above result and name the scientist associated with this principle.
c) Explain the mechanism in which two or more species competing with each other can co-exist.
OR
Graphs A and B shown below depict interaction of two species. Which graph indicates Mutualism? Give reason.
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| A | B |
Write a note on parasitism.
Describe mutualism.
