A) statement A is correct, B is wrong
B) statement B is correct, A is wrong
C) both the statements A and B are correct
D) both the statements A and B are wrong
Correct Answer: A
Solution :
Diversity at level of community and ecosystem is of three types alpha (within community diversity), beta (between community diversity) and gamma (regional diversity). Gamma diversity represents the total richness of species in all the habitats founds within a region, geographical area or landscape. Biodiversity increases from high to low latitudes but decreases from lower to higher altitudes. This is mainly due to drop in temperature (6.5°C per 1000 m of ascension) and greater seasonal variability at higher altitudes, both of which are limiting factors for species propagation.
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