The upper epidermis C. The mesophyll D. The lower E. pidermis 相关知识点: 试题来源: 解析 C。解析:叶片中与光合作用关系最密切的部分是叶肉“mesophyll”。选项A“veins”叶脉主要是运输物质的通道;选项B“upper epidermis”上表皮主要起保护作用;选项D“lower epidermis”下表皮也是起保护作用。反馈 收藏 ...
A red leaf can make food too because under the red color1ing of the leaf there are food——making cells. There are no leaves which are completely yellow, for they can't make food. The plant makes sugar for its food. In sunlight green leaves make a lot of sugar....
A、Leaves with closely spaced veins tend to have lower hydraulic resistance. B、Older leaves and leaves in shade tend to have higher hydraulic resistance. C、In general, the upper epidermis of a leaf has more stomata. D、None of the others. 点击...
A red leaf can make food too because under the red coloring of the leaf there are food-making cells. There are no leaves which are completely yellow, for they can''t make food.The plant makes sugar for its food. In sunlight green leaves make a lot of sugar. The veins ( 叶脉 ) ...
the of and to a in that is was he for it with as his on be at by i this had not are but from or have an they which one you were all her she there would their we him been has when who will no more if out so up said what its about than into them can only other time new...
Two animals from each treatment group were randomly picked and euthanized by CO2 inhalation for sampling jejunal tissue. Blood was drawn from wing veins and placed into serum separator tubes (SST; BD Bioscience, Franklin Lakes, NJ, USA), and then centrifuged at 1409 g for 10 min to obtain ...