A) insects and fungi
B) limited sunlight and paucity of nutrients
C) water limits and fire
D) None of the above
Correct Answer: C
Solution :
Exp. [c] In a grassland, trees have already been cleared away due to fires in the past, which also changes the ground composition. Without the trees to hold them, water washes away most of the soil and the underlying ground becomes rocky and barren. After this, lichens become the pioneer population, which is then replaced by grasses. The grasses however absorb most of the water before it reaches the roots of the shrubs. Thus, the ecological succession does not occur beyond the grasses.
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