1题目分别取适宜条件下和低温低光照强度条件下生长的玉米植株叶片,徒手切片后,立即用碘液染色,置于显微镜下观察,发现前者维管束鞘细胞有蓝色颗粒,而后者维管束鞘细胞没有蓝色颗粒,后者没有的原因是()A.维管束鞘细胞不含叶绿体,不能进行光合作用B.维管束鞘细胞能进行光反应,不 In the 1 subject, the leaves of maize plants grown under suitable conditions and low temperature and low light intensity were taken. After being sliced ​​by hand, they were immediately stained with iodine solution and observed under a microscope. The vascular bundle sheath cells of the former were found to have blue particles, while the latter were The bundle sheath cells do not have blue particles, and the reason for the absence of the latter is () A. Vascular bundle sheath cells do not contain chloroplasts and cannot perform photosynthesis B. Vascular bundle sheath cells can undergo photoreaction, not