What is an important characteristic of the plant cell wall?
a. it is fluid.
b. it is rigid.
c. it is alive.
d. it stretches. gy

The best answer is b - it is rigid.

The cell wall is defined as the rigid, outermost layer found in plants and also certain bacteria, algae and fungi. It is absent in animal cells.

The plant cell wall is made up  cellulose which is a structural carbohydrate. The cell wall is rigid and thus offers structural support allowing plant such as trees to grow to great heights.

It also helps prevent water loss, helps protect against insects and pathogens and keeps the shape of the plant.

only about ten percent of the energy at one trophic level is passed on to organisms at the next trophic level. the remainder of the energy is used in life processes or lost as heat.