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Question
The data given in the table shows species richness of mosses, shrubs and trees calculated for one hectare (10,000m2) of land every 50 years for 200 years based on a long running ecological study.
According to the data natural disaster occurred during which time period?Year Mosses Shrubs Trees 1800 16 2 0 1850 21 7 4 1900 10 5 3 1950 13 12 6 2000 17 28 14
The data given in the table shows species richness of mosses, shrubs and trees calculated for one hectare (10,000m2) of land every 50 years for 200 years based on a long running ecological study.
According to the data natural disaster occurred during which time period?
| Year | Mosses | Shrubs | Trees |
| 1800 | 16 | 2 | 0 |
| 1850 | 21 | 7 | 4 |
| 1900 | 10 | 5 | 3 |
| 1950 | 13 | 12 | 6 |
| 2000 | 17 | 28 | 14 |
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Solution
The correct option is B 1850-1900
During 1850 to 1900, mosses (21 -10), shrubs (7-5) and tree species (4-3) were reduced dramatically. Given data does not show reduction of species in any other period. Therefore, the correct answer is option C.
During 1850 to 1900, mosses (21 -10), shrubs (7-5) and tree species (4-3) were reduced dramatically. Given data does not show reduction of species in any other period.
Therefore, the correct answer is option C.
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