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Organisms and Populations

Short Answer Type

31. What is brood parasitism ? Give an example.

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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 ?

Differences between diapause and hibernation

Diapause

Hibernation

1. It is a dormant stage during the development of an organism.

2. It occurs both in summer and winter.

3. During this period there is reduction in the amout of free water.

1. It is state of inactivity in animals where the metabolism is slowed down. The amials hide enter a state of deep sleep.

2. It occurs during winter only.

3. There is no such adaptation.

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40. What do you understand by resource partitioning.

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