When environmental conditions worsen, the impact on plant community structure is_________
A. The level remains unchanged, and the hierarchical structure is simplified
B. Decrease the level, keep the level structure unchanged
C. Reduce the level, simplify the hierarchical structure
D. The level remains unchanged, the hierarchy remains unchanged
Answer:C
When environmental conditions worsen, the impact on plant community structure is_________
A. The level remains unchanged, and the hierarchical structure is simplified B. Decrease the level, keep the level structure unchanged C. Reduce the level, simplify the hierarchical structure D. The level remains unchanged, the hierarchy remains unchanged