所屬科目:研究所、轉學考(插大)◆生態學
1. Which description below about C3 and C4 plants are INCORRECT? (A) Among all plant families, the grass family has the highest number of species using the C4 photosynthetic pathway. (B) Photosynthesis in C3 plants lead to lowerfractionation compared to that in C4 plants. (C) C4 photosynthesis is evolutionarily younger than C3 photosynthesis. (D) C4 plants are in general more efficient in water usage than C3 plants.
21. Species richness is often affected by habitat disturbance. A student found a positive correlation between species richness and the degree of disturbance in habitat (Fig. 1a). However, another student found a negative correlation (Fig. 1b). Please explain the underlying mechanisms for each pattern.