Question

plant cell wall structure
pectin
cross-linking glycan
cellulose microfibrils
middle lamella
primary cell wall
plasma membrane
figure 1
what type of stress does the cell wall lessen in tall plants?
chemical stress
shearing stress
mechanical stress

Explanation:

The plant cell wall provides structural support. In tall plants, it helps resist forces like gravity and wind, which are mechanical in nature. Chemical stress involves chemical changes, and shearing stress is a specific mechanical type, but the cell wall's main role here is reducing general mechanical stress (e.g., from weight, external forces).

Answer:

mechanical stress (the option with text "mechanical stress")