Q5 of 62 Page 110

Is it possible that productivity and diversity of a natural community remain constant over a time period of, say one hundred years?

No, it is impossible to maintain constant productivity and natural community over a time period of 100 years. This is because with time the population size increases resulting in the depletion of the availability of resources. It is also a cause of competition among species. Moreover, environmental condition also changes with time.


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3

Discuss one example, based on your day-to-day observations, showing how loss of one species may lead to the extinction of another.

 4

A species-area curve is drawn by plotting the number of species against the area. How is it that when a very large area is considered the slope is steeper than that for smaller areas?

 6

There is greater biodiversity in tropical /subtropical regions than in temperate region. Explain.

 7

Why are the conventional methods not suitable for the assessment of biodiversity of bacteria?