文章:
题目:
The passage suggests that which of the following is a function likely to be performed by an oligosaccharin?
选项:
A、 To stimulate a particular plant cell to become part of a plant's root system
B、 To stimulate the walls of a particular cell to produce other oligosaccharins
C、 To activate enzymes that release specific chemical messengers from plant cell walls
D、 To duplicate the gene complement in a particular plant cell
E、 To produce multiple effects on a particular subsystem of plant cells
答案:
A