Question

sand spinifex grass is adapted to growing on sand dunes. it is a rapidly spreading plant and the creeping runners produce new root systems. which of these best explains the benefits of these features?
a. it allows the plant to tolerate salt.
b. it limits water loss through the leaves
c. it provides support by anchoring the plant
d. it protects the plant from predators

Explanation:

沙生针茅适应在沙丘生长，其快速蔓延且匍匐茎产生新根系的特点。植物根系主要功能是固定植株（anchoring the plant），沙丘环境松散，新根系可更好固定植物。A选项耐盐与根系无关；B选项限制叶片水分流失是叶片结构等相关，非根系；D选项保护植物免受捕食者侵害多与植物化学物质、形态（如刺等）有关，非根系功能。

Answer:

C. It provides support by anchoring the plant