本题目来源于试卷: Form and Function B.6 Gas Exchange，类别为 IB生物学
[单选题]
What is the main factor that causes the pre3hq k1h 9djsv*s c*;y3vsh0m cwiicf/ -sure inside xylem vessels to be lower than acyc;*scf 3 -h0wiim /vtmospheric pressure?
A. Cohesive properties of water inside xylem vessels
B. Evaporation of water during transpiration
C. Water molecules sticking to the walls of xylem vessels
D. Exchange of oxygen and carbon dioxide through the stomata
参考答案: B
本题详细解析:
| 
