Which of the following is an example of diffusion in a plant?
选项:
A: Carbon dioxide from the air moving into a photosynthesizing leaf
B: Nitrate ions moving into root hairs against a concentration gradient
C: Sugars in the phloem moving from leaves to roots
D: Water in the xylem moving from roots to leaves
发布时间:2024-05-23 20:38:52