Q1. Substances are transported across cell membranes by different processes
Figure 1 represents a section of cell membrane in a plant root.
Figure
Outside root cell
Inside root cell
Key
• Substance A
• Substance B
Substance C
Cell membrane
(a) Substance B moves into the root cell.
Suggest what substance B is.
Explain your answer.

Mineral salt

Explanation:

The mineral salt is absorbed into the roots inform of ions (from the soil) through the process of diffusion

equal distribution i think.

the correct answer is option b

behavioral response need communication and thus co-ordination at several levels such as interaction among cells, organ system and the entire organism.

behavioral response produces both internal and environmental stimulus.