Question 18
(Multiple Choice)
Refer to the figure.
The figure shows the influence of soil temperature on the interaction between two wetland plants, forget-me-nots and cattails. Cattails have extensive air channels for transporting oxygen in their leaves, stems, and roots. Forget-me-nots lack air channels. Based on the figure, as soil temperature increased, the influence of cattails on the growth of forget-me-nots changed from
A) neutral to negative (no effect to competition).
B) positive to negative (facilitation to competition).
C) negative to positive (competition to facilitation).
D) positive to neutral (facilitation to no effect).
Answer