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Organisms and Populations

Short Answer Type

31. What is brood parasitism ? Give an example.

Brood parasitism. It refers to the phenomenon in which one (parasitic) bird species lays its eggs in the nest of another bird species so that the host incubates the eggs.

Example. Cuckoo birds lays eggs in the nest of crows.

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32. List a few adaptations which parasites have developed.

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Long Answer Type

33. Define mutualism. Give examples.

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Short Answer Type

34. Describe the phenomenon of parasitism.

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35. Describe the phenomenon of commensalism with an example of commensal between an orchid growing as an epiphyte on a mango branch.

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36. Describe the phenomenon of mutualism with the example of lichen.

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37. What is immigration and emigration ?

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38. Explain Gause’s competitive exclusion principle.

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39. How is diapause different from hibernation ?

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40. What do you understand by resource partitioning.

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