Which one of the following is a characteristic feature of cropland ecosystem? [2016]
Absence of weeds
Ecological succession
Absence of soil organisms
Least genetic diversity
(4)
Cropland ecosystem is an artificial or man-made terrestrial ecosystem which is created and maintained by human beings for their maximum benefits. Therefore, they will have least genetic diversity.
Vertical distribution of different species occupying different levels in a biotic community is known as [2015]
Zonation
Pyramid
Divergence
Stratification
