A. Polysaccharide, this is because polysaccharides have cellulose which make the grass stand up.
Answer:
from precipitation, oceans lakes streams and soil
Answer: SECONDARY CELL WALL.
Explanation: When cell wall grow,it becomes thickened,then it further deposits new layers of a different material (different from that of the primary cell wall) from where secondary cell wall is formed.
This secondary cell wall is made up of cellulose,hemicellulose,and lignin.
They function in providing additional strength,support, rigidity to cells and the larger plant.
Sensory, interneuron, motor
The Skull protects the brain.